fix(schematics): jsonc-parser as explicit dep and enable lint check (#1627)

Author: damyanpetev

eslint.config.mjs

@@ -31,7 +31,10 @@ export default [
     },
     rules: {
       'complexity': 'off',
-      'eslint-plugin-import/no-extraneous-dependencies': 'warn',
+      'eslint-plugin-import/no-extraneous-dependencies': [
+        'error',
+        {'packageDir': ['./packages/cli', './packages/core', './packages/igniteui-mcp/igniteui-doc-mcp', './packages/igx-templates', './packages/ng-schematics']}
+      ],
       'eslint-plugin-import/order': [
         'off',
         {

packages/ng-schematics/package.json

@@ -23,6 +23,7 @@
     "@igniteui/angular-templates": "~21.1.1500-rc.1",
     "@igniteui/cli-core": "~15.0.0-rc.1",
     "@schematics/angular": "^21.0.0",
+    "jsonc-parser": "3.3.1",
     "minimatch": "^10.0.1",
     "rxjs": "~7.8.1"
   },