Adds:
- New options to `arcade chat`: `-h/--host`, `-p/--port`, and
`--tls/--notls`. This allows us to point `arcade chat` at a different
server than what's configured in `arcade.toml` which is very helpful for
debugging.
- Special case: if you do `-h localhost`, it will automatically use port
9099 and no TLS unless otherwise specified.
- Adds a non-fatal engine health check to `arcade chat` startup:
<img width="499" alt="image"
src="https://github.com/user-attachments/assets/b7fae29e-2f8d-4004-a27b-645b4cd997a8">
75c6a2becf