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/reakit/Disclosure/Disclosure/package.json

@@ -0,0 +1,8 @@
+{
+  "name": "reakit/Disclosure/Disclosure",
+  "private": true,
+  "sideEffects": false,
+  "main": "../../lib/Disclosure/Disclosure",
+  "module": "../../es/Disclosure/Disclosure",
+  "types": "../../ts/Disclosure/Disclosure"
+}

node_modules/reakit/Disclosure/DisclosureContent/package.json

@@ -0,0 +1,8 @@
+{
+  "name": "reakit/Disclosure/DisclosureContent",
+  "private": true,
+  "sideEffects": false,
+  "main": "../../lib/Disclosure/DisclosureContent",
+  "module": "../../es/Disclosure/DisclosureContent",
+  "types": "../../ts/Disclosure/DisclosureContent"
+}

node_modules/reakit/Disclosure/DisclosureState/package.json

@@ -0,0 +1,8 @@
+{
+  "name": "reakit/Disclosure/DisclosureState",
+  "private": true,
+  "sideEffects": false,
+  "main": "../../lib/Disclosure/DisclosureState",
+  "module": "../../es/Disclosure/DisclosureState",
+  "types": "../../ts/Disclosure/DisclosureState"
+}

node_modules/reakit/Disclosure/package.json

@@ -0,0 +1,8 @@
+{
+  "name": "reakit/Disclosure",
+  "private": true,
+  "sideEffects": false,
+  "main": "../lib/Disclosure",
+  "module": "../es/Disclosure",
+  "types": "../ts/Disclosure"
+}