Update README with sandboxing feature note

chore: remove plugin system, keep one-liner install

fix: remove hooks path from plugin.json, use auto-discovery

fix: move hooks.json to .claude-plugin/hooks/

fix: add ./ prefix to hooks path

fix: correct marketplace source path

feat: add marketplace.json for plugin discovery

fix: correct hooks.json schema and path

fix: reference hooks.json in plugin manifest

feat: add Claude Code plugin support

fix: read user input from /dev/tty when piped

feat: add one-liner installation script

Merge branch 'main' of github.com:elertan/claude-code-rm-guard

docs: add MIT license

Revise deny rules to ask rules for rm commands