Update @vitejs/plugin-react dependency for vite 4 (#548)

Fixes #547

This also updates the version of mdx1-csf to one that no longer requires the use of the react vite plugin to compile jsx, it handles compilation itself.  So, we no longer need to include `@vitejs/plugin-react` in all projects, and react projects will need to make sure it's installed.  That makes this a breaking change.

And this also updates Vite to 4 in the examples, and fixes some missing dependencies.

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Co-authored-by: Josh Wooding <12938082+joshwooding@users.noreply.github.com>

Author: IanVS

examples/lit-ts/package.json

@@ -27,7 +27,7 @@
     "npm-run-all": "^4.1.5",
     "rollup-plugin-postcss-lit": "^2.0.0",
     "sass": "^1.50.1",
-    "vite": "^3.1.0-beta.1",
+    "vite": "4.0.4",
     "wait-on": "^6.0.1"
   }
 }