feat: run React Compiler on oxc instead of babel (#344)

Co-authored-by: Cursor Agent <cursoragent@cursor.com>
Co-authored-by: Cody Olsen <stipsan@users.noreply.github.com>

Author: stipsan

.changeset/oxc-react-compiler.md

@@ -0,0 +1,5 @@
+---
+'@portabletext/react': patch
+---
+
+React Compiler now runs on [oxc](https://oxc.rs) instead of babel. Same output, no changes needed.

package.json

@@ -59,22 +59,21 @@
   "devDependencies": {
     "@changesets/changelog-github": "^0.7.0",
     "@changesets/cli": "^2.31.1",
-    "@rolldown/plugin-babel": "^0.2.3",
     "@sanity/client": "^7.25.0",
     "@sanity/image-url": "^2.1.1",
     "@sanity/tsconfig": "^2.2.1",
-    "@sanity/tsdown-config": "^0.21.1",
+    "@sanity/tsdown-config": "^0.26.0",
     "@sanity/ui": "^3.5.0",
     "@types/leaflet": "^1.9.21",
     "@types/react": "^19.2.17",
     "@types/react-dom": "^19.2.3",
     "@types/ws": "^8.18.1",
-    "@vitejs/plugin-react": "^6.0.4",
-    "babel-plugin-react-compiler": "^1.0.0",
+    "@vitejs/plugin-react": "^6.1.0",
     "esbuild": "^0.28.1",
     "esbuild-register": "^3.6.0",
     "groq": "^6.6.0",
     "leaflet": "^1.9.4",
+    "oxc-transform-react": "^0.145.0",
     "oxfmt": "^0.61.0",
     "oxlint": "^1.79.0",
     "oxlint-tsgolint": "^7.0.2001",