refactor: update plugin documentation and installation instructions

- Revised the introduction in `plugins.md` for clarity and conciseness.
- Updated the installation instructions to streamline the process for both bulk and individual plugin installations.
- Enhanced the `README.md` to provide a more comprehensive overview of features and installation methods.
- Improved the organization of available plugins with direct links to their respective documentation.
- Added new sections for advanced navigation and filtering options, enhancing user guidance.