Add first-class uv command dispatch and hook rewrite

[GratefulDave]

Summary

• add a first-class rtk uv command with subcommand dispatch
• route rtk uv run python -m pytest ... (and rtk uv run pytest ...) through the existing pytest filter
• route rtk uv pip ... through the existing pip filter
• add compact handling for rtk uv sync ...
• passthrough all other uv subcommands via rtk uv ...
• update hook rewrite logic to rewrite any uv ... command to rtk uv ...
• add hook rewrite tests for uv pip, uv run ... pytest, and uv sync

Testing

• cargo test (pass)
• HOOK=/Users/username/PycharmProjects/rtk/hooks/rtk-rewrite.sh bash /Users/username/PycharmProjects/rtk/hooks/test-rtk-rewrite.sh (fails on pre-existing expectations and audit-log checks unrelated to this change)

Refs: #140 (comment)

[GratefulDave]

Do you need me to make any changes to this?