Publish harness and TUI open-source

initial sync from the monorepo

crates/codegen/xai-grok-update/src/lib.rs

@@ -0,0 +1,7 @@
+pub mod auto_update;
+mod minimum_version;
+pub mod version;
+
+pub use auto_update::UpdateStatus;
+pub use minimum_version::enforce_minimum_version_or_exit;
+pub use version::{UpdateConfig, channel_label, channel_name, write_version_cache};