chore(react-router): migrate to eslint, add prettier (#26634)

.github/workflows/actions/build-react-router/action.yml

@@ -6,15 +6,6 @@ runs:
     - uses: actions/setup-node@v3
       with:
         node-version: 16.x
-    - name: Install Dependencies
-      run: npm install --legacy-peer-deps
-      shell: bash
-      working-directory: ./packages/react-router
-    - uses: ./.github/workflows/actions/download-archive
-      with:
-        name: ionic-react
-        path: ./packages/react
-        filename: ReactBuild.zip
     - uses: ./.github/workflows/actions/download-archive
       with:
         name: ionic-core
@@ -26,7 +17,7 @@ runs:
         path: ./packages/react
         filename: ReactBuild.zip
     - name: Install Dependencies
-      run: npm install --legacy-peer-deps
+      run: npm ci
       shell: bash
       working-directory: ./packages/react-router
     - name: Sync

packages/react-router/.eslintrc.js

@@ -0,0 +1,26 @@
+module.exports = {
+  "env": {
+    "browser": true,
+    "es6": true,
+    "node": true
+  },
+  "extends": [
+    "eslint:recommended",
+    "plugin:@typescript-eslint/recommended",
+    "@ionic/eslint-config/recommended"
+  ],
+  "parser": "@typescript-eslint/parser",
+  "parserOptions": {
+    "project": "tsconfig.json",
+    "sourceType": "module"
+  },
+  "plugins": [
+    "@typescript-eslint",
+  ],
+  "rules": {
+    "@typescript-eslint/explicit-module-boundary-types": "off",
+    "@typescript-eslint/no-non-null-assertion": "off",
+    "@typescript-eslint/prefer-optional-chain": "off",
+    "@typescript-eslint/ban-types": "off"
+  }
+};