Add IconType enum, make Service fields readonly

src/lib/types/data-types.ts

@@ -1,9 +1,18 @@
 export type Service = {
-	name: string;
-	icon: string;
-	href: string;
-	desc: string;
-	warn: string;
-	extLink?: string;
-	id: number;
+	readonly name: string;
+	readonly icon: string;
+	readonly iconType: IconType;
+	readonly href: string;
+	readonly desc: string;
+	readonly warn: string;
+	readonly extLink?: string;
+	readonly id: number;
 };
+
+export enum IconType {
+	SVG = "svg",
+	AVIF = "avif",
+	PNG = "png",
+	WEBP = "webp",
+	JPG = "jpg",
+}