Introduced tsconfig.app.json and tsconfig.base.json + Refactored eslint.config.js to the latest structure (#652)

* Introduced tsconfig.app.json and tsconfig.base.json

* yarn.lock

* Introduced tsconfig.app.json, tsconfig.base.jsonfig.

* Refactored eslint.config.js to latest structure

* Returned previous recommended rules.

* More rules

* Force import rules

* Check

* Check

* Cleanup ESLint configuration and plugins

* Cleanup heap: "writable",DD_RUM: "writable" from ESLint configuration

* "scripts" moved to the top of package.json

frontend/tsconfig.app.json

@@ -0,0 +1,14 @@
+{
+  "extends": "./tsconfig.base.json",
+  "compilerOptions": {
+    "allowJs": false
+  },
+  "include": [
+    "src",
+    "public/static",
+    ".flowbite-react/**/*",
+    ".storybook/**/*.ts",
+    "public/analytics.js",
+    "cypress"
+  ]
+}