refactor: update dependencies and clean up code

- Removed Milkdown dependencies from package.json and added Monaco Editor, Turndown, and Turndown Plugin for GFM.
- Cleaned up unnecessary 'pluginType' property from meta in MarkdownPlugin class.
- Updated comments in types.ts for clarity on attachment resource ID handling.

Author: ivictbor

README.md

@@ -2,6 +2,6 @@
 
 <img src="https://img.shields.io/badge/License-MIT-blue.svg" alt="License: MIT" /> <img src="https://woodpecker.devforth.io/api/badges/3848/status.svg" alt="Build Status" /> <a href="https://www.npmjs.com/package/@adminforth/markdown"> <img src="https://img.shields.io/npm/dt/@adminforth/markdown" alt="npm downloads" /> </a> <a href="https://www.npmjs.com/package/@adminforth/markdown"> <img src="https://img.shields.io/npm/v/@adminforth/markdown" alt="npm version" /> </a>
 
-Enables powerful Markdown editing capabilities in AdminForth applications using <a href="https://milkdown.dev">Milkdown</a>.
+Enables Markdown editing capabilities in AdminForth applications using Monaco Editor.
 
 ## For usage, see [AdminForth Markdown Documentation](https://adminforth.dev/docs/tutorial/Plugins/markdown/)