Migrate CodeMirror from v5 to v6 - initial implementation

Co-authored-by: tsnobip <2479216+tsnobip@users.noreply.github.com>

Author: Copilot

package-lock.json

@@ -12,9 +12,19 @@
     "@babel/generator": "^7.24.7",
     "@babel/parser": "^7.24.7",
     "@babel/traverse": "^7.24.7",
+    "@codemirror/commands": "^6.9.0",
+    "@codemirror/lang-javascript": "^6.2.4",
+    "@codemirror/language": "^6.11.3",
+    "@codemirror/lint": "^6.9.0",
+    "@codemirror/search": "^6.5.11",
+    "@codemirror/state": "^6.5.2",
+    "@codemirror/theme-one-dark": "^6.1.3",
+    "@codemirror/view": "^6.38.5",
     "@docsearch/react": "^3.9.0",
     "@headlessui/react": "^2.2.4",
+    "@lezer/highlight": "^1.2.1",
     "@mdx-js/loader": "^3.1.0",
+    "@replit/codemirror-vim": "^6.3.0",
     "@rescript/react": "^0.14.0-rc.1",
     "@rescript/webapi": "^0.1.0-experimental-0b87498",
     "codemirror": "^5.54.0",

package.json

@@ -1,4 +1,3 @@
-import "codemirror/lib/codemirror.css";
 import "styles/docson.css";
 import "styles/main.css";
 import "styles/utils.css";