Publish harness and TUI open-source

initial sync from the monorepo

crates/codegen/xai-grok-shell/changelogs/0.2.43.md

@@ -0,0 +1,8 @@
+# 0.2.43
+
+## Bug Fixes
+
+- **ask_user_question** tool can now be enabled in allowlists without requiring plan-mode tools.
+- **Shift+Tab** mode cycling (Normal → Plan → Auto-Approve) works again in the agent view.
+- **Ctrl+C** now cancels a blocking `grok update` cleanly instead of leaving an orphaned download repainting the terminal.
+