🚨(build) fix Vite CJS config warning

Since the migration to Vite 5 we had the "The CJS build of Vite's
Node API is deprecated" error ocurring during compilation.

We needed to rename to .mts the vite config file in order for it
to acknowledge that we are using the Node ESM API, this is needed
because we do not set "type": "module" in package.json because
we need to support CJS too.

packages/react/tsconfig.node.json

@@ -5,5 +5,7 @@
     "moduleResolution": "Node",
     "allowSyntheticDefaultImports": true
   },
-  "include": ["vite.config.ts"]
+  "include": [
+    "vite.config.mts"
+  ]
 }

packages/react/vite.config.mts

@@ -1,9 +1,8 @@
 import { resolve } from "path";
-import { defineConfig } from "vitest/config";
+import { defineConfig, BuildOptions } from "vite";
 import react from "@vitejs/plugin-react";
 import dts from "vite-plugin-dts";
 import tsconfigPaths from "vite-tsconfig-paths";
-import { BuildOptions } from "vite";
 
 // https://vitejs.dev/config/
 export default defineConfig(({ mode }) => {