migrate checkin rules editor to vue3

- move constants to a module
- move reading from and writing to non-vue html to django interop module
- switch to composition api and script setup sfc with pug
- use optional chaining operators a lot to simplify code

package.json

@@ -29,6 +29,8 @@
   "devDependencies": {
     "@eslint/js": "^9.39.2",
     "@stylistic/eslint-plugin": "^5.7.1",
+    "@types/jquery": "^3.5.33",
+    "@types/moment": "^2.11.29",
     "@vitejs/plugin-vue": "^6.0.4",
     "@vue/eslint-config-typescript": "^14.6.0",
     "eslint": "^9.39.2",