update: sponsor zod validation schema (#214)

apps/site/src/app/(main)/(home)/sections/Sponsors/getSponsors.ts

@@ -3,17 +3,24 @@ import { cache } from "react";
 import { client } from "@/lib/sanity/client";
 import { SanityDocument, SanityImageReference } from "@/lib/sanity/types";
 
+export const Sponsor = z.object({
+	_type: z.literal("sponsor"),
+	_key: z.string(),
+	name: z.string(),
+	url: z.string().url().optional(),
+	tier: z.union([
+		z.literal("platinum"),
+		z.literal("gold"),
+		z.literal("bronze"),
+		z.literal("silver"),
+		z.literal("sponsored-prize"),
+		z.literal("in-kind"),
+	]),
+	logo: SanityImageReference,
+});
+
 const Sponsors = SanityDocument.extend({
-	sponsors: z.array(
-		z.object({
-			_type: z.literal("sponsor"),
-			_key: z.string(),
-			name: z.string(),
-			url: z.string().url().optional(),
-			tier: z.union([z.literal("bronze"), z.literal("silver")]),
-			logo: SanityImageReference,
-		}),
-	),
+	sponsors: z.array(Sponsor),
 });
 
 export const getSponsors = cache(async () => {