Add loader at app start and configure eslint (#10)

Part of [laconicd testnet validator enrollment](https://www.notion.so/laconicd-testnet-validator-enrollment-6fc1d3cafcc64fef8c5ed3affa27c675)

Co-authored-by: IshaVenikar <ishavenikar7@gmail.com>
Reviewed-on: cerc-io/laconic-wallet-web#10
Co-authored-by: Nabarun <nabarun@deepstacksoft.com>
Co-committed-by: Nabarun <nabarun@deepstacksoft.com>

package.json

@@ -49,6 +49,8 @@
     "start": "react-app-rewired start",
     "build": "react-app-rewired build",
     "test": "react-app-rewired test",
+    "lint": "eslint .",
+    "prepare": "husky",
     "eject": "react-scripts eject"
   },
   "eslintConfig": {
@@ -75,7 +77,14 @@
     "@types/node": "^16.7.13",
     "@types/react": "^18.0.0",
     "@types/react-dom": "^18.0.0",
+    "@typescript-eslint/eslint-plugin": "^6.13.2",
+    "@typescript-eslint/parser": "^6.13.2",
     "crypto-browserify": "^3.12.0",
+    "eslint": "^8.3.0",
+    "eslint-config-react-app": "^7.0.1",
+    "eslint-plugin-react": "^7.33.2",
+    "eslint-webpack-plugin": "^3.1.1",
+    "husky": "^9.0.11",
     "react-app-rewired": "^2.2.1",
     "stream-browserify": "^3.0.0"
   }