Fix claude.cmd shim not launching claude after profile switch

Implement cctx managed --remove to revert managed --add

Add cctx set <profile> command and simplify shims to use it

Add cctx list --managed to show managed files

Make bare cctx show help and active profile instead of requiring a subcommand

Nativize Windows Scripts

Add resolve command to sync enabledPlugins across profiles

Add link command as inverse of unlink

Revert shim and install to bash, only cctx uses Python

Convert bash scripts to Python, drop jq dependency

Initial commit: cctx profile manager for Claude Code