perf: use native magic-string

Author: sxzz

package.json

@@ -77,7 +77,6 @@
   },
   "dependencies": {
     "ast-kit": "^2.2.0",
-    "magic-string-ast": "^1.0.3",
     "rolldown-string": "^0.2.1",
     "unplugin": "^2.3.11"
   },
@@ -92,6 +91,7 @@
     "eslint": "^9.39.2",
     "prettier": "^3.7.4",
     "quansync": "^1.0.0",
+    "rolldown": "1.0.0-beta.54",
     "tsdown": "^0.18.0",
     "typescript": "^5.9.3",
     "vite": "^7.3.0",