Add user badges (#36752)

Implemented #29798

This feature implements list badges, create new badges, view badge, edit
badge and assign badge to users.

- List all badges
![(screenshot)](https://github.com/user-attachments/assets/9dbf243e-c704-49f8-915a-73704e226da9)
- Create new badges
![(screenshot)](https://github.com/user-attachments/assets/8a3fff7e-fe6f-49b0-a7c5-bbba34478019)
- View badge
![(screenshot)](https://github.com/user-attachments/assets/dd7a882b-6e2c-47d2-93e0-05a2698a41e5)
![(screenshot)](https://private-user-images.githubusercontent.com/75789103/558982759-53536300-e189-406b-8b0e-824e1a768b92.png?jwt=eyJ0eXAiOiJKV1QiLCJhbGciOiJIUzI1NiJ9.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.4aAfpFaziiXDG7W2HaNJop0B62-NR4f0Ni9YNjTZq0M)
- Edit badge
![(screenshot)](https://github.com/user-attachments/assets/7124671a-ed97-4c98-ac7d-34863377fa62)
- Add user to badge
![(screenshot)](https://github.com/user-attachments/assets/3438b492-0197-4acb-b9f2-2f9f7c80582e)

modules/validation/binding.go

@@ -27,6 +27,8 @@ const (
 	ErrUsername = "UsernameError"
 	// ErrInvalidGroupTeamMap is returned when a group team mapping is invalid
 	ErrInvalidGroupTeamMap = "InvalidGroupTeamMap"
+	// ErrInvalidBadgeSlug is returned when a badge slug is invalid
+	ErrInvalidBadgeSlug = "InvalidBadgeSlug"
 )
 
 // AddBindingRules adds additional binding rules
@@ -40,6 +42,7 @@ func AddBindingRules() {
 	addGlobOrRegexPatternRule()
 	addUsernamePatternRule()
 	addValidGroupTeamMapRule()
+	addSlugPatternRule()
 }
 
 func addGitRefNameBindingRule() {
@@ -123,6 +126,22 @@ func addValidSiteURLBindingRule() {
 	})
 }
 
+func addSlugPatternRule() {
+	binding.AddRule(&binding.Rule{
+		IsMatch: func(rule string) bool {
+			return rule == "BadgeSlug"
+		},
+		IsValid: func(errs binding.Errors, name string, val any) (bool, binding.Errors) {
+			str := fmt.Sprintf("%v", val)
+			if !IsValidBadgeSlug(str) {
+				errs.Add([]string{name}, ErrInvalidBadgeSlug, "invalid badge slug")
+				return false, errs
+			}
+			return true, errs
+		},
+	})
+}
+
 func addGlobPatternRule() {
 	binding.AddRule(&binding.Rule{
 		IsMatch: func(rule string) bool {