Add Gitea as a git provider for harness workspace repositories

Support Gitea alongside GitHub/GitLab for repo search, authenticated
cloning, and pull request creation via Gitea API. Tasks can specify
gitProvider and gitBaseUrl in their spec (defaults to github for
backwards compat). Auto-discovers GITEA_TOKEN from env on boot.

apps/harness/src/lib/repo-search.ts

@@ -1,7 +1,7 @@
 import { getRawCredentialsByProvider } from "./credentials";
 
 export interface RepoResult {
-  provider: "github" | "gitlab";
+  provider: "github" | "gitlab" | "gitea";
   fullName: string;
   url: string;
   description: string;
@@ -15,6 +15,7 @@ export async function searchRepos(query: string): Promise<RepoResult[]> {
   const results = await Promise.allSettled([
     searchGitHub(query),
     searchGitLab(query),
+    searchGitea(query),
   ]);
 
   return results.flatMap(r => r.status === "fulfilled" ? r.value : []);
@@ -98,3 +99,42 @@ async function searchGitLab(query: string): Promise<RepoResult[]> {
 
   return results;
 }
+
+async function searchGitea(query: string): Promise<RepoResult[]> {
+  const creds = await getRawCredentialsByProvider("gitea");
+  if (creds.length === 0) return [];
+
+  const results: RepoResult[] = [];
+
+  for (const cred of creds) {
+    const baseUrl = cred.baseUrl || "https://gitea.coreworlds.io";
+    try {
+      const res = await fetch(
+        `${baseUrl}/api/v1/repos/search?q=${encodeURIComponent(query)}&limit=10&sort=updated`,
+        {
+          headers: {
+            Authorization: `token ${cred.token}`,
+          },
+        }
+      );
+
+      if (!res.ok) continue;
+
+      const data = await res.json();
+      for (const repo of data.data || []) {
+        results.push({
+          provider: "gitea",
+          fullName: repo.full_name,
+          url: repo.html_url,
+          description: repo.description || "",
+          defaultBranch: repo.default_branch || "main",
+          private: repo.private,
+        });
+      }
+    } catch {
+      // skip failed credential
+    }
+  }
+
+  return results;
+}