feat: add giteaService for fetching files and content from GitHub repositories

src/lib/giteaService.js

@@ -16,8 +16,8 @@ const GITHUB_RAW  = 'https://raw.githubusercontent.com';
  * @returns {Promise<Array<{name, sha, path}>>}
  */
 export async function getRepoFolder(owner, repo, folder = '', branch = 'main') {
-  const path = folder ? folder.replace(/^\/|\/$/g, '') : '';
-  const url  = `${GITHUB_API}/repos/${owner}/${repo}/contents/${path}?ref=${branch}`;
+  // Use the GitHub Git Trees API to fetch all files recursively in one request
+  const url = `${GITHUB_API}/repos/${owner}/${repo}/git/trees/${branch}?recursive=1`;
 
   const res = await fetch(url, {
     headers: { Accept: 'application/vnd.github+json' },
@@ -28,11 +28,23 @@ export async function getRepoFolder(owner, repo, folder = '', branch = 'main') {
     throw new Error(`GitHub API ${res.status}: ${err.message || 'Could not list folder'}`);
   }
 
-  const items = await res.json();
-  // Return only files (.md / .txt), not sub-directories
-  return items.filter(
-    item => item.type === 'file' && (item.name.endsWith('.md') || item.name.endsWith('.txt'))
-  );
+  const data = await res.json();
+  
+  // If folder is 'docs', we only want paths starting with 'docs/'
+  const folderPrefix = folder ? folder.replace(/^\/|\/$/g, '') + '/' : '';
+
+  // Return only files (blobs) that match the folder prefix and file extensions
+  return data.tree
+    .filter(item => 
+      item.type === 'blob' && 
+      item.path.startsWith(folderPrefix) && 
+      (item.path.endsWith('.md') || item.path.endsWith('.txt'))
+    )
+    .map(item => ({
+      name: item.path.split('/').pop(),
+      path: item.path,
+      sha: item.sha
+    }));
 }
 
 /**