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/helpers_test.go

@@ -186,3 +186,24 @@ func TestIsValidUsername(t *testing.T) {
 		})
 	}
 }
+
+func TestIsValidBadgeSlug(t *testing.T) {
+	tests := []struct {
+		arg  string
+		want bool
+	}{
+		{arg: "badge-1", want: true},
+		{arg: "badge.slug", want: true},
+		{arg: "new", want: true},
+		{arg: "Badge_1", want: true},
+		{arg: "a..b", want: false},
+		{arg: "a/b", want: false},
+		{arg: "Awesome!", want: false},
+		{arg: "Emoji 💯", want: false},
+	}
+	for _, tt := range tests {
+		t.Run(tt.arg, func(t *testing.T) {
+			assert.Equalf(t, tt.want, IsValidBadgeSlug(tt.arg), "IsValidBadgeSlug(%v)", tt.arg)
+		})
+	}
+}