chore: upgrade Angular to 22 and Ionic to 9

eslint.config.cjs

@@ -0,0 +1,37 @@
+const { defineConfig } = require('eslint/config');
+const angular = require('angular-eslint');
+
+module.exports = defineConfig(
+  { ignores: ['projects/**', 'www/**', 'coverage/**'] },
+  {
+    files: ['src/**/*.ts'],
+    extends: angular.configs.tsRecommended,
+    languageOptions: {
+      parserOptions: {
+        project: ['./tsconfig.json'],
+        tsconfigRootDir: __dirname
+      }
+    },
+    processor: angular.processInlineTemplates,
+    rules: {
+      // Preserve existing Ionic page updates while retaining Zone.js.
+      '@angular-eslint/prefer-on-push-component-change-detection': 'off',
+      '@angular-eslint/component-class-suffix': [
+        'error',
+        { suffixes: ['Page', 'Component'] }
+      ],
+      '@angular-eslint/component-selector': [
+        'error',
+        { type: 'element', prefix: 'app', style: 'kebab-case' }
+      ],
+      '@angular-eslint/directive-selector': [
+        'error',
+        { type: 'attribute', prefix: 'app', style: 'camelCase' }
+      ]
+    }
+  },
+  {
+    files: ['src/**/*.html'],
+    extends: angular.configs.templateRecommended
+  }
+);