style: format code and add prettier configuration files

package-lock.json

@@ -38,6 +38,7 @@
         "karma-jasmine": "~5.1.0",
         "karma-jasmine-html-reporter": "~2.1.0",
         "postcss": "^8.5.1",
+        "prettier": "3.4.2",
         "tailwindcss": "^3.4.17",
         "typescript": "~5.6.2"
       }
@@ -10845,6 +10846,22 @@
       "resolved": "https://registry.npmjs.org/postcss-value-parser/-/postcss-value-parser-4.2.0.tgz",
       "integrity": "sha512-1NNCs6uurfkVbeXG4S8JFT9t19m45ICnif8zWLd5oPSZ50QnwMfK+H3jv408d4jw/7Bttv5axS5IiHoLaVNHeQ=="
     },
+    "node_modules/prettier": {
+      "version": "3.4.2",
+      "resolved": "https://registry.npmjs.org/prettier/-/prettier-3.4.2.tgz",
+      "integrity": "sha512-e9MewbtFo+Fevyuxn/4rrcDAaq0IYxPGLvObpQjiZBMAzB9IGmzlnG9RZy3FFas+eBMu2vA0CszMeduow5dIuQ==",
+      "dev": true,
+      "license": "MIT",
+      "bin": {
+        "prettier": "bin/prettier.cjs"
+      },
+      "engines": {
+        "node": ">=14"
+      },
+      "funding": {
+        "url": "https://github.com/prettier/prettier?sponsor=1"
+      }
+    },
     "node_modules/proc-log": {
       "version": "5.0.0",
       "resolved": "https://registry.npmjs.org/proc-log/-/proc-log-5.0.0.tgz",