Release grok-build-hud v0.3.0: Claude-HUD-style same-window status for Grok Build

Multi-line tmux strip (context, quota, tools, todos, git), theme sync with
Grok UI, full/essential/minimal presets, one-shot installer, EN+ZH docs,
and 40 unit tests.

.gitignore

@@ -0,0 +1,13 @@
+node_modules/
+dist/
+*.log
+.DS_Store
+*.tsbuildinfo
+.coverage
+.env
+.env.*
+*.local
+.idea/
+.vscode/
+*.swp
+.hud-debug/