fix: add 10s timeout to registry URL validation to prevent indefinite hang

When --registry-url points to an unreachable host, the CLI hangs forever
because fetch() has no timeout. Add AbortController with 10s timeout,
switch to HEAD method, and provide distinct error messages for timeout
vs other network failures.

Closes #2027

https://claude.ai/code/session_01K5UYcnS3skK6SKhFz3dcZs

Author: Islam0953

src/utils/generate/registry.ts

@@ -8,12 +8,22 @@ export function registryURLParser(input?: string) {
 
 export async function registryValidation(registryUrl?: string, registryAuth?: string, registryToken?: string) {
   if (!registryUrl) { return; }
+  const controller = new AbortController();
+  const timer = setTimeout(() => controller.abort(), 10000);
   try {
-    const response = await fetch(registryUrl as string);
+    const response = await fetch(registryUrl as string, {
+      method: 'HEAD',
+      signal: controller.signal,
+    });
     if (response.status === 401 && !registryAuth && !registryToken) {
       throw new Error('You Need to pass either registryAuth in username:password encoded in Base64 or need to pass registryToken');
     }
-  } catch {
+  } catch (error: unknown) {
+    if (error instanceof Error && error.name === 'AbortError') {
+      throw new Error(`Connection to registryURL timed out after 10s: ${registryUrl}`);
+    }
     throw new Error(`Can't fetch registryURL: ${registryUrl}`);
+  } finally {
+    clearTimeout(timer);
   }
 }