Introduce GiteaLocaleNumber custom element to handle number localization on pages. (#23861)

Follow #21429 & #22861

Use `<gitea-locale-number>` instead of backend `PrettyNumber`. All old
`PrettyNumber` related functions are removed. A lot of code could be
simplified.

And some functions haven't been used for long time (dead code), so they
are also removed by the way (eg: `SplitStringAtRuneN`, `Dedent`)

This PR only tries to improve the `PrettyNumber` rendering problem, it
doesn't touch the "plural" problem.

Screenshot:


![image](https://user-images.githubusercontent.com/2114189/229290804-1f63db65-1e34-4a54-84ba-e00b44331b17.png)


![image](https://user-images.githubusercontent.com/2114189/229290911-c88dea00-b11d-48dd-accb-9f52edd73ce4.png)

1 files changed, 25 insertions, 33 deletions

diff --git a/modules/util/util.go b/modules/util/util.go
index 9d3a8dcfac..9c7097ad34 100644
--- a/modules/util/util.go
+++ b/modules/util/util.go
@@ -7,8 +7,9 @@ import (
 	"bytes"
 	"crypto/rand"
 	"errors"
+	"fmt"
 	"math/big"
-	"regexp"
+	"os"
 	"strconv"
 	"strings"
 
@@ -200,40 +201,14 @@ func ToTitleCaseNoLower(s string) string {
 	return titleCaserNoLower.String(s)
 }
 
-var (
-	whitespaceOnly    = regexp.MustCompile("(?m)^[ \t]+$")
-	leadingWhitespace = regexp.MustCompile("(?m)(^[ \t]*)(?:[^ \t\n])")
-)
-
-// Dedent removes common indentation of a multi-line string along with whitespace around it
-// Based on https://github.com/lithammer/dedent
-func Dedent(s string) string {
-	var margin string
-
-	s = whitespaceOnly.ReplaceAllString(s, "")
-	indents := leadingWhitespace.FindAllStringSubmatch(s, -1)
-
-	for i, indent := range indents {
-		if i == 0 {
-			margin = indent[1]
-		} else if strings.HasPrefix(indent[1], margin) {
-			continue
-		} else if strings.HasPrefix(margin, indent[1]) {
-			margin = indent[1]
-		} else {
-			margin = ""
-			break
-		}
-	}
-
-	if margin != "" {
-		s = regexp.MustCompile("(?m)^"+margin).ReplaceAllString(s, "")
-	}
-	return strings.TrimSpace(s)
+func logError(msg string, args ...any) {
+	// TODO: the "util" package can not import the "modules/log" package, so we use the "fmt" package here temporarily.
+	// In the future, we should decouple the dependency between them.
+	_, _ = fmt.Fprintf(os.Stderr, msg, args...)
 }
 
-// NumberIntoInt64 transform a given int into int64.
-func NumberIntoInt64(number interface{}) int64 {
+// ToInt64 transform a given int into int64.
+func ToInt64(number interface{}) int64 {
 	var value int64
 	switch v := number.(type) {
 	case int:
@@ -246,6 +221,23 @@ func NumberIntoInt64(number interface{}) int64 {
 		value = int64(v)
 	case int64:
 		value = v
+	case uint:
+		value = int64(v)
+	case uint8:
+		value = int64(v)
+	case uint16:
+		value = int64(v)
+	case uint32:
+		value = int64(v)
+	case uint64:
+		value = int64(v)
+	case string:
+		var err error
+		if value, err = strconv.ParseInt(v, 10, 64); err != nil {
+			logError("strconv.ParseInt failed for %q: %v", v, err)
+		}
+	default:
+		logError("unable to convert %q to int64", v)
 	}
 	return value
 }