Add ghost_protocol as submodule + auto-clone fallback

- Added ghost_protocol-public as git submodule so it's pulled with
  git clone --recursive
- deploy_phantom() now checks submodule path first, then standalone
  ~/tools/ghost_protocol/, and auto-clones from GitHub as last resort

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

.gitmodules

@@ -0,0 +1,3 @@
+[submodule "ghost_protocol"]
+	path = ghost_protocol
+	url = https://github.com/n0mad1k/ghost_protocol-public.git