Create first custom emoji

src/utils/StringUtils.ts

@@ -75,4 +75,13 @@ export function check_youtube_id(s: string) : boolean {
 		&& !s.includes(".")
 		&& !s.includes("'")
 		&& !s.includes("\"")
+}
+
+/**
+ * Check an emoji code
+ * 
+ * @param s The emoji code to check
+ */
+export function checkEmojiCode(s: string) : boolean {
+	return s.match(/^:[a-zA-Z0-9]*:$/) != null
 }