Merge `new project` templates into one (#24985)

Additionally simplify the `new project` template slightly.

Review hint: Disable whitespace changes.

<details><summary>Before</summary>

## New repo project

![grafik](https://github.com/go-gitea/gitea/assets/51889757/4de977e8-3688-45cd-8832-49b001e6f249)

## Edit repo project

![grafik](https://github.com/go-gitea/gitea/assets/51889757/daaf353f-6c99-48bd-b37a-a3bc64459079)

## New user/org project

![grafik](https://github.com/go-gitea/gitea/assets/51889757/6a5a3be5-f51a-4599-b75c-7adb9710d2fa)

## Edit user/org project

![grafik](https://github.com/go-gitea/gitea/assets/51889757/a4768f49-cf46-4773-8a0f-54dfdcc1c1b8)
</details>

<details><summary>After</summary>

## New repo project

![grafik](https://github.com/go-gitea/gitea/assets/51889757/3d0ac8a0-850a-4743-963c-71c66ef38d07)

## Edit repo project

![grafik](https://github.com/go-gitea/gitea/assets/51889757/6b86a1cd-e360-4a9b-aaf7-af032d0d991a)

## New user/org project

![grafik](https://github.com/go-gitea/gitea/assets/51889757/a7b0964c-e4c7-4924-842a-52a58499bc36)

## Edit user/org project

![grafik](https://github.com/go-gitea/gitea/assets/51889757/0fbc5605-afee-49bd-a44a-8646f8c55681)
</details>

---------

Co-authored-by: Giteabot <teabot@gitea.io>

1 files changed, 57 insertions, 74 deletions

diff --git a/templates/projects/new.tmpl b/templates/projects/new.tmpl
index 60609999fc..6d1ae04159 100644
--- a/templates/projects/new.tmpl
+++ b/templates/projects/new.tmpl
@@ -1,87 +1,70 @@
-<div role="main" aria-label="{{.Title}}" class="page-content repository projects edit-project new milestone">
-	<div class="ui container">
-		<div class="navbar">
-			{{if and .CanWriteProjects .PageIsEditProject}}
-			<div class="ui right floated secondary menu">
-				<a class="ui small green button" href="{{$.HomeLink}}/-/projects/new">{{.locale.Tr "repo.milestones.new"}}</a>
-			</div>
+<div class="ui container">
+	<h2 class="ui dividing header">
+		{{if .PageIsEditProjects}}
+		{{.locale.Tr "repo.projects.edit"}}
+		<div class="sub header">{{.locale.Tr "repo.projects.edit_subheader"}}</div>
+		{{else}}
+			{{.locale.Tr "repo.projects.new"}}
+			<div class="sub header">{{.locale.Tr "repo.projects.new_subheader"}}</div>
 			{{end}}
-		</div>
-		<div class="ui divider"></div>
-		<h2 class="ui dividing header">
-			{{if .PageIsEditProjects}}
-			{{.locale.Tr "repo.projects.edit"}}
-			<div class="sub header">{{.locale.Tr "repo.projects.edit_subheader"}}</div>
-			{{else}}
-				{{.locale.Tr "repo.projects.new"}}
-				<div class="sub header">{{.locale.Tr "repo.projects.new_subheader"}}</div>
-				{{end}}
-		</h2>
-		{{template "base/alert" .}}
-		<form class="ui form grid" action="{{.Link}}" method="post">
-			{{.CsrfTokenHtml}}
-			<div class="eleven wide column">
-				<input type="hidden" id="redirect" name="redirect" value="{{.redirect}}">
-				<div class="field {{if .Err_Title}}error{{end}}">
-					<label>{{.locale.Tr "repo.projects.title"}}</label>
-					<input name="title" placeholder="{{.locale.Tr "repo.projects.title"}}" value="{{.title}}" autofocus required>
-				</div>
-				<div class="field">
-					<label>{{.locale.Tr "repo.projects.description"}}</label>
-					<textarea name="content" placeholder="{{.locale.Tr "repo.projects.description_placeholder"}}">{{.content}}</textarea>
-				</div>
-
-				{{if not .PageIsEditProjects}}
-					<div class="field">
-						<label>{{.locale.Tr "repo.projects.template.desc"}}</label>
-						<div class="ui selection dropdown">
-							<input type="hidden" name="board_type" value="{{.type}}">
-							<div class="default text">{{.locale.Tr "repo.projects.template.desc_helper"}}</div>
-							<div class="menu">
-								{{range $element := .BoardTypes}}
-									<div class="item" data-id="{{$element.BoardType}}" data-value="{{$element.BoardType}}">{{$.locale.Tr $element.Translation}}</div>
-								{{end}}
-							</div>
-						</div>
-					</div>
-				{{end}}
+	</h2>
+	{{template "base/alert" .}}
+	<form class="ui form grid" action="{{.Link}}" method="post">
+		{{.CsrfTokenHtml}}
+		<div class="eleven wide column">
+			<input type="hidden" id="redirect" name="redirect" value="{{.redirect}}">
+			<div class="field {{if .Err_Title}}error{{end}}">
+				<label>{{.locale.Tr "repo.projects.title"}}</label>
+				<input name="title" placeholder="{{.locale.Tr "repo.projects.title"}}" value="{{.title}}" autofocus required>
+			</div>
+			<div class="field">
+				<label>{{.locale.Tr "repo.projects.description"}}</label>
+				<textarea name="content" placeholder="{{.locale.Tr "repo.projects.description_placeholder"}}">{{.content}}</textarea>
+			</div>
 
+			{{if not .PageIsEditProjects}}
 				<div class="field">
-					<label>{{.locale.Tr "repo.projects.card_type.desc"}}</label>
+					<label>{{.locale.Tr "repo.projects.template.desc"}}</label>
 					<div class="ui selection dropdown">
-						{{svg "octicon-triangle-down" 14 "dropdown icon"}}
-						{{range $element := .CardTypes}}
-							{{if or (eq $.card_type $element.CardType) (and (not $.PageIsEditProjects) (eq $element.CardType 1))}}
-								<input type="hidden" name="card_type" value="{{$element.CardType}}">
-								<div class="default text">{{$.locale.Tr $element.Translation}}</div>
-							{{end}}
-						{{end}}
+						<input type="hidden" name="board_type" value="{{.type}}">
+						<div class="default text">{{.locale.Tr "repo.projects.template.desc_helper"}}</div>
 						<div class="menu">
-							{{range $element := .CardTypes}}
-								<div class="item" data-id="{{$element.CardType}}" data-value="{{$element.CardType}}">{{$.locale.Tr $element.Translation}}</div>
+							{{range $element := .BoardTypes}}
+								<div class="item" data-id="{{$element.BoardType}}" data-value="{{$element.BoardType}}">{{$.locale.Tr $element.Translation}}</div>
 							{{end}}
 						</div>
 					</div>
 				</div>
-			</div>
-			<div class="ui container">
-				<div class="ui divider"></div>
-				<div class="ui left">
-					{{if .PageIsEditProjects}}
-					<a class="ui cancel button" href="{{$.HomeLink}}/-/projects{{if eq .redirect "project"}}/{{.projectID}}{{end}}">
-						{{.locale.Tr "repo.milestones.cancel"}}
-					</a>
-					<button class="ui primary button">
-						{{.locale.Tr "repo.projects.modify"}}
-					</button>
-					{{else}}
-						<button class="ui primary button">
-							{{.locale.Tr "repo.projects.create"}}
-						</button>
+			{{end}}
+
+			<div class="field">
+				<label>{{.locale.Tr "repo.projects.card_type.desc"}}</label>
+				<div class="ui selection dropdown">
+					{{svg "octicon-triangle-down" 14 "dropdown icon"}}
+					{{range $element := .CardTypes}}
+						{{if or (eq $.card_type $element.CardType) (and (not $.PageIsEditProjects) (eq $element.CardType 1))}}
+							<input type="hidden" name="card_type" value="{{$element.CardType}}">
+							<div class="default text">{{$.locale.Tr $element.Translation}}</div>
+						{{end}}
 					{{end}}
+					<div class="menu">
+						{{range $element := .CardTypes}}
+							<div class="item" data-id="{{$element.CardType}}" data-value="{{$element.CardType}}">{{$.locale.Tr $element.Translation}}</div>
+						{{end}}
+					</div>
 				</div>
 			</div>
-
-		</form>
-	</div>
+		</div>
+		<div class="ui container">
+			<div class="ui divider"></div>
+			<div class="ui left">
+				<a class="ui cancel button" href="{{$.CancelLink}}">
+					{{.locale.Tr "repo.milestones.cancel"}}
+				</a>
+				<button class="ui primary button">
+					{{if .PageIsEditProjects}}{{.locale.Tr "repo.projects.modify"}}{{else}}{{.locale.Tr "repo.projects.create"}}{{end}}
+				</button>
+			</div>
+		</div>
+	</form>
 </div>