Improve twenty-front build performance (vite rollup option) (#10771)

In this PR, I'm specifying to vite build that
'@scalar/api-reference-react' is an external dependency and should not
be considered as a module we maintain (it won't get its own chunk at
build time and we won't generate sourcemaps on our end).

I'm not sure why vite is considering it internal in the first place (I
can see that it's generating .vue.js files, might be the first time we
are relying on a vue library)

packages/twenty-front/vite.config.ts

@@ -145,6 +145,9 @@ export default defineConfig(({ command, mode }) => {
     build: {
       outDir: 'build',
       sourcemap: VITE_BUILD_SOURCEMAP === 'true',
+      rollupOptions: {
+        external: ['@scalar/api-reference-react'],
+      },
     },
 
     envPrefix: 'REACT_APP_',