feat: clone GitHub repo into a workspace (#1331)

* feat: clone GitHub repo into a workspace

Add an end-to-end "clone a GitHub repo and register it as a Paseo
workspace" flow: a new workspace.github.clone RPC, daemon handler,
client method, CLI `paseo clone` command, and a GitHub-repo mode in
the project picker modal. Gated behind the workspaceGithubClone
server capability flag.

- protocol: workspace.github.clone request/response schemas + feature flag
- server: handleWorkspaceGithubCloneRequest, normalizeCloneRepository
- client: DaemonClient.cloneGithubWorkspace
- cli: `paseo clone <repo> --dir <path> [--protocol https|ssh]`
- app: GitHub-repo mode, clone-protocol picker, error surfacing

Review fixes:
- CLI clone now checks the workspaceGithubClone capability and fails
  fast with a clear "update the host" error instead of hanging for the
  full request timeout against an older daemon.
- Replace the duplicated client-side URL-detection regex (app + CLI)
  with a shared isCompleteGitRemote() in @getpaseo/protocol/git-remote,
  backed by parseGitRemoteLocation so clients classify remotes
  identically to the daemon (fixes confusing errors for git://, ftp://,
  file:// inputs).
- Add git-remote.test.ts covering the shared classifier.

* Fix GitHub clone failure handling

---------

Co-authored-by: Mohamed Boudra <boudra.moha@gmail.com>

packages/protocol/src/git-remote.ts

@@ -24,6 +24,19 @@ export function parseGitHubRemoteUrl(remoteUrl: string): GitHubRemoteIdentity |
   return parseGitHubRemoteIdentity(location.path);
 }
 
+/**
+ * Whether `repo` is already a complete git remote (a URL or scp-like address)
+ * rather than `owner/repo` shorthand that still needs a clone protocol picked.
+ *
+ * Clients (app + CLI) and the daemon must agree on this classification: the
+ * daemon treats `parseGitRemoteLocation(repo) !== null` as "complete remote"
+ * and everything else as shorthand, so reuse the same parser here instead of a
+ * separate regex that would drift (e.g. accepting `git://` the parser rejects).
+ */
+export function isCompleteGitRemote(repo: string): boolean {
+  return parseGitRemoteLocation(repo) !== null;
+}
+
 export function parseGitRemoteLocation(remoteUrl: string): GitRemoteLocation | null {
   const trimmed = remoteUrl.trim();
   if (!trimmed) return null;