fix: prevent asset conflicts between React and Grid.js versions

Add coexistence checks to all enqueue methods to prevent loading
both React and Grid.js assets simultaneously.

Changes:
- ReactAdmin.php: Only enqueue React assets when ?react=1
- Init.php: Skip Grid.js when React active on admin pages
- Form.php, Coupon.php, Access.php: Restore classic assets when ?react=0
- Customer.php, Product.php, License.php: Add coexistence checks

Now the toggle between Classic and React versions works correctly.

Co-authored-by: Claude Opus 4.7 <noreply@anthropic.com>

node_modules/prettier/plugins/babel.d.ts

@@ -0,0 +1,17 @@
+import { Parser } from "../index.js";
+
+export declare const parsers: {
+  babel: Parser;
+  "babel-flow": Parser;
+  "babel-ts": Parser;
+  __js_expression: Parser;
+  __ts_expression: Parser;
+  __vue_expression: Parser;
+  __vue_ts_expression: Parser;
+  __vue_event_binding: Parser;
+  __vue_ts_event_binding: Parser;
+  __babel_estree: Parser;
+  json: Parser;
+  json5: Parser;
+  "json-stringify": Parser;
+};