Improve avatar uploading / resizing / compressing, remove Fomantic card module (#24653)

Fixes: #8972
Fixes: #24263

And I think it also (partially) fix #24263 (no need to convert) ,
because users could upload any supported image format if it isn't larger
than AVATAR_MAX_ORIGIN_SIZE


The main idea: 

* if the uploaded file size is not larger than AVATAR_MAX_ORIGIN_SIZE,
use the origin
* if the resized size is larger than the origin, use the origin

Screenshots:

JPG:

<details>


![image](https://github.com/go-gitea/gitea/assets/2114189/70e98bb0-ecb9-4c4e-a89f-4a37d4e37f8e)

</details>

APNG:

<details>


![image](https://github.com/go-gitea/gitea/assets/2114189/9055135b-5e2d-4152-bd72-596fcb7c6671)


![image](https://github.com/go-gitea/gitea/assets/2114189/50364caf-f7f6-4241-a289-e485fe4cd582)

</details>

WebP (animated)

<details>


![image](https://github.com/go-gitea/gitea/assets/2114189/f642eb85-498a-49a5-86bf-0a7b04089ae0)

</details>

The only exception: if a WebP image is larger than MaxOriginSize and it
is animated, then current `webp` package can't decode it, so only in
this case it isn't supported. IMO no need to support such case: why a
user would upload a 1MB animated webp as avatar? crazy .....

---------

Co-authored-by: silverwind <me@silverwind.io>

2 files changed, 6 insertions, 5 deletions

diff --git a/docs/content/doc/administration/config-cheat-sheet.en-us.md b/docs/content/doc/administration/config-cheat-sheet.en-us.md
index af6b3a2edd..82665d7d2c 100644
--- a/docs/content/doc/administration/config-cheat-sheet.en-us.md
+++ b/docs/content/doc/administration/config-cheat-sheet.en-us.md
@@ -792,9 +792,10 @@ and
 - `AVATAR_STORAGE_TYPE`: **default**: Storage type defined in `[storage.xxx]`. Default is `default` which will read `[storage]` if no section `[storage]` will be a type `local`.
 - `AVATAR_UPLOAD_PATH`: **data/avatars**: Path to store user avatar image files.
 - `AVATAR_MAX_WIDTH`: **4096**: Maximum avatar image width in pixels.
-- `AVATAR_MAX_HEIGHT`: **3072**: Maximum avatar image height in pixels.
-- `AVATAR_MAX_FILE_SIZE`: **1048576** (1Mb): Maximum avatar image file size in bytes.
-- `AVATAR_RENDERED_SIZE_FACTOR`: **3**: The multiplication factor for rendered avatar images. Larger values result in finer rendering on HiDPI devices.
+- `AVATAR_MAX_HEIGHT`: **4096**: Maximum avatar image height in pixels.
+- `AVATAR_MAX_FILE_SIZE`: **1048576** (1MiB): Maximum avatar image file size in bytes.
+- `AVATAR_MAX_ORIGIN_SIZE`: **262144** (256KiB): If the uploaded file is not larger than this byte size, the image will be used as is, without resizing/converting.
+- `AVATAR_RENDERED_SIZE_FACTOR`: **2**: The multiplication factor for rendered avatar images. Larger values result in finer rendering on HiDPI devices.
 
 - `REPOSITORY_AVATAR_STORAGE_TYPE`: **default**: Storage type defined in `[storage.xxx]`. Default is `default` which will read `[storage]` if no section `[storage]` will be a type `local`.
 - `REPOSITORY_AVATAR_UPLOAD_PATH`: **data/repo-avatars**: Path to store repository avatar image files.
diff --git a/docs/content/doc/administration/config-cheat-sheet.zh-cn.md b/docs/content/doc/administration/config-cheat-sheet.zh-cn.md
index 41eed612ac..c672b61598 100644
--- a/docs/content/doc/administration/config-cheat-sheet.zh-cn.md
+++ b/docs/content/doc/administration/config-cheat-sheet.zh-cn.md
@@ -214,8 +214,8 @@ menu:
 - `AVATAR_STORAGE_TYPE`: **local**: 头像存储类型，可以为 `local` 或 `minio`，分别支持本地文件系统和 minio 兼容的API。
 - `AVATAR_UPLOAD_PATH`: **data/avatars**: 存储头像的文件系统路径。
 - `AVATAR_MAX_WIDTH`: **4096**: 头像最大宽度，单位像素。
-- `AVATAR_MAX_HEIGHT`: **3072**: 头像最大高度，单位像素。
-- `AVATAR_MAX_FILE_SIZE`: **1048576** (1Mb): 头像最大大小。
+- `AVATAR_MAX_HEIGHT`: **4096**: 头像最大高度，单位像素。
+- `AVATAR_MAX_FILE_SIZE`: **1048576** (1MiB): 头像最大大小。
 
 - `REPOSITORY_AVATAR_STORAGE_TYPE`: **local**: 仓库头像存储类型，可以为 `local` 或 `minio`，分别支持本地文件系统和 minio 兼容的API。
 - `REPOSITORY_AVATAR_UPLOAD_PATH`: **data/repo-avatars**: 存储仓库头像的路径。