[issue-282] Add Trino Kerberos authentication

[joshua-park321]

Closes #282

Summary

• add None, Basic, Kerberos, and GSSAPI authentication choices to Trino connections
• construct Trino Kerberos/GSSAPI authentication from the selected connection settings and offer package installation when the selected extra is absent
• preserve authentication options in Trino connection URLs and avoid password prompts for ticket-based authentication
• document Kerberos/GSSAPI prerequisites and installation

Testing

• uv run pytest tests/unit -v
• uv run pytest tests/test_password_prompts.py tests/unit/test_url_parser.py -v
• uv run ruff check sqlit/domains/connections/domain/passwords.py sqlit/domains/connections/cli/prompts.py sqlit/domains/connections/ui/screens/connection.py sqlit/domains/connections/app/url_parser.py sqlit/domains/connections/providers/trino tests/unit/test_trino_adapter.py
• uv run --extra trino-kerberos python -c "from trino.auth import KerberosAuthentication"
• uv run --extra trino-gssapi python -c "from trino.auth import GSSAPIAuthentication"

Manual Validation

• Requires a valid Kerberos ticket, such as one obtained with kinit, and access to a Kerberos-enabled Trino server.