Publish harness and TUI open-source

initial sync from the monorepo

crates/codegen/xai-grok-shell/changelogs/0.2.8.md

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+# 0.2.8
+
+## Features
+
+- **New /login** slash command lets you re-authenticate from within a session without quitting.
+- **Compaction summaries** now include the full transcript path so the model can reference prior details.
+- **Cursor skills and rules** are now discovered alongside Grok and Claude directories.
+
+## Bug Fixes
+
+- **Fixed monitor tool** schema to show the correct 10-hour default timeout.
+- **Fixed a panic** that could occur when installing marketplace plugins.
+