- output: a success response with no data payload now prints "Done" instead of
nothing (a silent exit 0 looked like a no-op).
- commands: add top-level aliases for `get` status reads — `url`, `cdp-url`
(and `cdp_url`), `title`, `html`, `text`, `value`, `count`, `box`, `styles`,
`attr` — so `agent-browser url` no longer errors "Unknown command".
- connect errors now explain the Chrome 136+ realities:
- connect-failure mentions the "Allow remote debugging?" consent dialog and
that remote debugging is a startup flag, not a setting.
- no-Chrome error tells the user to relaunch Chrome with
--remote-debugging-port (auto-connect then works).
- --cdp discovery failure explains Chrome 136+ dropped the HTTP discovery
endpoints and to use the default auto-connect instead.