feat(fetch): support gh: prefix

Author: pi0

docs/2.generators/fetch.md

@@ -43,3 +43,6 @@ The `fetch` generator fetches a URL (using [unjs/ofetch](https://ofetch.unjs.io)
 ## Arguments
 
 - `url`: The URL to fetch from
+
+> [!TIP]
+> You can start url with `gh:` to use github contents!

src/generators/fetch.ts

@@ -4,9 +4,19 @@ export const fetch = defineGenerator({
   name: "fetch",
   async generate({ args }) {
     const { $fetch } = await import("ofetch");
-    const body = await $fetch(args.url);
+
+    let url = args.url;
+    if (!url) {
+      throw new Error("URL is required!");
+    }
+    if (url.startsWith("gh:")) {
+      url = `https://raw.githubusercontent.com/${url.slice(3)}`;
+    }
+
+    const contents = await $fetch(url);
+
     return {
-      contents: body,
+      contents,
     };
   },
 });