feat: add es-lint + fix unused import

package.json

@@ -6,7 +6,8 @@
     "start": "ng serve",
     "build": "ng build",
     "watch": "ng build --watch --configuration development",
-    "test": "ng test"
+    "test": "ng test",
+    "lint": "ng lint"
   },
   "prettier": {
     "printWidth": 100,
@@ -37,6 +38,7 @@
     "@angular/build": "v20-lts",
     "@angular/cli": "v20-lts",
     "@angular/compiler-cli": "v20-lts",
+    "angular-eslint": "21.0.1",
     "@types/jasmine": "~5.1.0",
     "jasmine-core": "~5.9.0",
     "karma": "~6.4.0",

src/app/features/product-list/product-list.ts

@@ -9,7 +9,7 @@ import {
 } from '@angular/core';
 
 import { Router } from '@angular/router';
-import {MatProgressSpinner, MatProgressSpinnerModule} from '@angular/material/progress-spinner';
+import {MatProgressSpinner} from '@angular/material/progress-spinner';
 
 import { ProductService } from '../../core/services/product.service';
 import { Product } from '../../core/models/product.model';