feat: add jest and initial tests for masking values

package.json

@@ -4,7 +4,7 @@
   "private": true,
   "type": "module",
   "scripts": {
-    "prebuild": "npm run update-dotenv && npm run lint",
+    "prebuild": "npm run update-dotenv && npm run lint && npm run test:unit",
     "build": "next build",
     "predev": "rm -rf .next",
     "dev": "PORT=3000 NEXT_PUBLIC_PORT=3000 next dev",
@@ -20,7 +20,9 @@
     "test:e2e:headless": "start-server-and-test test:setup http://127.0.0.1:3000/en/sponsoring \"cypress run --e2e\"",
     "test:setup": "npm run build && npm run start",
     "preinstall": "export $(cat .env.local | grep -v '^#' | xargs)",
-    "update-dotenv": "node update-dotenv.mjs"
+    "update-dotenv": "node update-dotenv.mjs",
+    "test:unit": "jest",
+    "test:unit:watch": "jest --watch"
   },
   "dependencies": {
     "@contentstack/live-preview-utils": "^1.4.0",
@@ -57,6 +59,9 @@
   },
   "devDependencies": {
     "@svgr/webpack": "^8.1.0",
+    "@testing-library/jest-dom": "^6.4.6",
+    "@testing-library/react": "^16.0.0",
+    "@types/jest": "^29.5.12",
     "@types/node": "^20",
     "@types/react": "^18",
     "@types/react-dom": "^18",
@@ -67,11 +72,14 @@
     "eslint-plugin-import": "^2.29.1",
     "eslint-plugin-simple-import-sort": "^12.1.0",
     "husky": "^9.0.11",
+    "jest": "^29.7.0",
+    "jest-environment-jsdom": "^29.7.0",
     "jiti": "^1.21.0",
     "lint-staged": "^15.2.2",
     "netlify-plugin-cypress": "^2.2.1",
     "prettier": "^3.2.5",
     "start-server-and-test": "^2.0.3",
+    "ts-node": "^10.9.2",
     "typescript": "^5",
     "typescript-plugin-css-modules": "^5.1.0"
   },