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/@tannin/compile/CHANGELOG.md

@@ -0,0 +1,37 @@
+## 1.1.0 (2020-03-07)
+
+New Features
+
+- Add TypeScript definitions
+
+## 1.0.4 (2019-11-27)
+
+Internal
+
+- Update project inter-dependencies
+
+## 1.0.3 (2019-03-07)
+
+Internal
+
+- Add `repository.directory` to `package.json`
+
+## 1.0.2 (2019-01-19)
+
+Documentation
+
+- Correct documentation unpkg links
+
+Internal
+
+- Use Lerna for managing mono-repo
+
+## 1.0.1 (2018-11-04)
+
+Bug Fixes
+
+- Fix dependencies pointers from local filesystem to npm copies.
+
+## 1.0.0 (2018-11-04)
+
+- Initial release