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/@wordpress/components/build/animation/index.js

@@ -0,0 +1,25 @@
+"use strict";
+
+Object.defineProperty(exports, "__esModule", {
+  value: true
+});
+Object.defineProperty(exports, "__unstableAnimatePresence", {
+  enumerable: true,
+  get: function () {
+    return _framerMotion.AnimatePresence;
+  }
+});
+Object.defineProperty(exports, "__unstableMotion", {
+  enumerable: true,
+  get: function () {
+    return _framerMotion.motion;
+  }
+});
+Object.defineProperty(exports, "__unstableMotionContext", {
+  enumerable: true,
+  get: function () {
+    return _framerMotion.MotionContext;
+  }
+});
+var _framerMotion = require("framer-motion");
+//# sourceMappingURL=index.js.map

node_modules/@wordpress/components/build/animation/index.js.map

@@ -0,0 +1 @@
+{"version":3,"names":["_framerMotion","require"],"sources":["@wordpress/components/src/animation/index.tsx"],"sourcesContent":["/**\n * Framer Motion is used to create animated, interactive interfaces. The package is roughly ~30kb so\n * this should ideally be loaded once across all Gutenberg packages. To give ourselves more flexibility\n * in trying animation options, we avoid making this public API.\n *\n * @see https://www.framer.com/docs/animation/\n */\n\n// eslint-disable-next-line no-restricted-imports\nexport {\n\tmotion as __unstableMotion,\n\tAnimatePresence as __unstableAnimatePresence,\n\tMotionContext as __unstableMotionContext,\n} from 'framer-motion';\n"],"mappings":";;;;;;;;;;;;;;;;;;;;;;;AASA,IAAAA,aAAA,GAAAC,OAAA"}