Add live link functionality and enhance Markdown editor features

- Implemented live link support in the Markdown editor, allowing users to click on links and open them in a new tab.
- Added keybinding (Ctrl/⌘ + Enter) to open links under the cursor.
- Introduced visual styles for live links to enhance user experience.
- Enhanced selection utilities to check for intersection with selections.
- Created a custom keymap for Markdown editing, including shortcuts for bold, italic, and fenced code blocks.
- Improved code block handling with line numbering and copy buttons for easy access.
- Added functionality to hide Markdown delimiters in live preview mode.
- Refactored and organized code for better readability and maintainability.

frontend/package.json

@@ -20,9 +20,18 @@
     "storybook:build": "storybook build"
   },
   "dependencies": {
-    "@mantine/core": "^8.1.2",
+    "@codemirror/commands": "^6.8.1",
+    "@codemirror/lang-markdown": "^6.3.4",
+    "@codemirror/language": "^6.11.3",
+    "@codemirror/language-data": "^6.5.1",
+    "@codemirror/state": "^6.5.2",
+    "@codemirror/theme-one-dark": "^6.1.3",
+    "@codemirror/view": "^6.38.2",
+    "@lezer/highlight": "^1.2.1",
+    "@mantine/core": "^8.2.8",
     "@mantine/hooks": "^8.1.2",
-    "@mdxeditor/editor": "^3.42.0",
+    "codemirror": "^6.0.2",
+    "mathjax-full": "^3.2.2",
     "react": "^19.1.1",
     "react-dom": "^19.1.1",
     "react-router-dom": "^7.6.2"