add redis, game icons and fix readme

src/routes/api/art[game].ts

@@ -0,0 +1,82 @@
+import { redisTtl, steamGridDbKey } from "@config/environment";
+import { logger } from "@helpers/logger";
+import { redis } from "bun";
+
+if (!steamGridDbKey) {
+	logger.warn("[SteamGridDB] Route disabled: Missing API key");
+}
+
+const routeDef: RouteDef = {
+	method: "GET",
+	accepts: "*/*",
+	returns: "application/json",
+};
+
+async function fetchSteamGridIcon(gameName: string): Promise<string | null> {
+	const cacheKey = `steamgrid:icon:${gameName.toLowerCase()}`;
+	const cached = await redis.get(cacheKey);
+	if (cached) return cached;
+
+	const search = await fetch(`https://www.steamgriddb.com/api/v2/search/autocomplete/${encodeURIComponent(gameName)}`, {
+		headers: {
+			Authorization: `Bearer ${steamGridDbKey}`,
+		},
+	});
+
+	if (!search.ok) return null;
+
+	const { data } = await search.json();
+	if (!data?.length) return null;
+
+	const gameId = data[0]?.id;
+	if (!gameId) return null;
+
+	const iconRes = await fetch(`https://www.steamgriddb.com/api/v2/icons/game/${gameId}`, {
+		headers: {
+			Authorization: `Bearer ${steamGridDbKey}`,
+		},
+	});
+
+	if (!iconRes.ok) return null;
+
+	const iconData = await iconRes.json();
+	const icon = iconData?.data?.[0]?.url ?? null;
+
+	if (icon) {
+		await redis.set(cacheKey, icon);
+		await redis.expire(cacheKey, redisTtl);
+	}
+	return icon;
+}
+
+async function handler(request: ExtendedRequest): Promise<Response> {
+	if (!steamGridDbKey) {
+		return Response.json(
+			{ status: 503, error: "Route disabled due to missing SteamGridDB key" },
+			{ status: 503 }
+		);
+	}
+
+	const { game } = request.params;
+
+	if (!game || typeof game !== "string" || game.length < 2) {
+		return Response.json({ status: 400, error: "Missing or invalid game name" }, { status: 400 });
+	}
+
+	const icon = await fetchSteamGridIcon(game);
+
+	if (!icon) {
+		return Response.json({ status: 404, error: "Icon not found" }, { status: 404 });
+	}
+
+	return Response.json(
+		{
+			status: 200,
+			game,
+			icon,
+		},
+		{ status: 200 }
+	);
+}
+
+export { handler, routeDef };