feat: some vue3 package improvements

- add codemirror as direct dependency
- remove @vue/runtime-dom (was needed for volar with vue2)
- remove setting for using volar with vue2

package.json

@@ -20,6 +20,7 @@
     "@vue/compat": "3.2.14",
     "bulma": "0.9.3",
     "camel-case": "4.1.2",
+    "codemirror": "^5.63.1",
     "copy-to-clipboard": "3.3.1",
     "date-fns": "2.24.0",
     "dompurify": "2.3.3",
@@ -52,9 +53,8 @@
     "@typescript-eslint/eslint-plugin": "4.32.0",
     "@typescript-eslint/parser": "4.32.0",
     "@vitejs/plugin-legacy": "^1.6.1",
-    "@vitejs/plugin-vue": "^1.9.0",
+    "@vitejs/plugin-vue": "^1.9.2",
     "@vue/eslint-config-typescript": "7.0.0",
-    "@vue/runtime-dom": "latest",
     "autoprefixer": "10.3.6",
     "axios": "0.21.4",
     "browserslist": "4.17.3",