fix: fix root start script (#5032)

Fixes #5022

See https://nx.dev/recipes/running-tasks/root-level-scripts#setup

packages/twenty-front/src/emotion.d.ts

@@ -0,0 +1,5 @@
+import { ThemeType } from 'twenty-ui';
+
+declare module '@emotion/react' {
+  export interface Theme extends ThemeType {}
+}