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/supports-hyperlinks/package.json

@@ -0,0 +1,48 @@
+{
+    "name": "supports-hyperlinks",
+    "version": "2.3.0",
+    "description": "Detect if your terminal emulator supports hyperlinks",
+    "license": "MIT",
+    "repository": "jamestalmage/supports-hyperlinks",
+    "author": {
+        "name": "James Talmage",
+        "email": "james@talmage.io",
+        "url": "github.com/jamestalmage"
+    },
+    "engines": {
+        "node": ">=8"
+    },
+    "scripts": {
+        "prepublishOnly": "npm run create-types",
+        "test": "xo && nyc ava",
+        "create-types": "tsc index.js --allowJs  --declaration --emitDeclarationOnly"
+    },
+    "files": [
+        "index.js",
+        "browser.js"
+    ],
+    "browser": "browser.js",
+    "keywords": [
+        "link",
+        "terminal",
+        "hyperlink",
+        "cli"
+    ],
+    "dependencies": {
+        "has-flag": "^4.0.0",
+        "supports-color": "^7.0.0"
+    },
+    "devDependencies": {
+        "ava": "^2.2.0",
+        "codecov": "^3.5.0",
+        "nyc": "^14.1.1",
+        "typescript": "^3.7.2",
+        "xo": "^0.24.0"
+    },
+    "nyc": {
+        "reporter": [
+            "lcov",
+            "text"
+        ]
+    }
+}