feat: add osu! version and release stream retrieval, along with skins count functionality

src/lib/api/osuapi.ts

@@ -0,0 +1,33 @@
+import type { StreamsResult } from '@/types';
+import { betterFetch } from '@better-fetch/fetch';
+
+const API_ENDPOINT = 'https://osu.ppy.sh/api/';
+
+const timeout = 5000; // 5 seconds;
+
+export const osuapi = {
+  latestBuildVersion: async (releaseStream: string): Promise<string | undefined> => {
+    const request = await betterFetch<StreamsResult>(`${API_ENDPOINT}v2/changelog`, {
+      timeout,
+      query: {
+        stream: 'none',
+      },
+      headers: {
+        'Content-Type': 'application/json',
+        'User-Agent': 'EZPPLauncher',
+      },
+    });
+    if (request.error) {
+      if (request.error.status >= 500 && request.error.status < 600)
+        throw new Error('Server not reachable');
+      return undefined;
+    }
+    const releaseData = request.data;
+    const selectedRelease = releaseData.streams.find(
+      (releaseBuild) =>
+        releaseBuild.name.toLowerCase() === releaseStream.replaceAll(' ', '').toLowerCase()
+    );
+    if (!selectedRelease) return undefined;
+    return selectedRelease.latest_build.display_version;
+  },
+};