feat: add syntax highlighting and enhance document editing features

- Import GitHub dark theme for highlight.js in main.ts
- Pass slug prop to VisualEditor in DocumentView.vue for version and normal editing modes
- Update Vite configuration to increase maximum cache size and add media proxy
- Add new dependencies for Tiptap extensions and highlight.js in package.json and package-lock.json

package.json

@@ -1,5 +1,12 @@
 {
   "dependencies": {
-    "@tailwindcss/typography": "^0.5.19"
+    "@tailwindcss/typography": "^0.5.19",
+    "@tiptap/extension-code-block-lowlight": "^3.22.3",
+    "@tiptap/extension-table": "^3.22.3",
+    "@tiptap/extension-table-cell": "^3.22.3",
+    "@tiptap/extension-table-header": "^3.22.3",
+    "@tiptap/extension-table-row": "^3.22.3",
+    "highlight.js": "^11.11.1",
+    "lowlight": "^3.3.0"
   }
 }