Antigravity CLI: /btw side questions can use tools, `--settings` overrides, and `agy acp` built in

Shengzhe Yao, who posted on X about changes the team shipped for its own daily agy runs, lists three updates to the Antigravity CLI:

• /btw side questions asked in the middle of a turn can now read files and call tools.
• --settings lets you pass config overrides when you launch the CLI.
• agy acp is now built into the Antigravity CLI.