Update twenty-front commands (#4667)

# This PR

- Moves dev and ci scripts to the `project.json` file in the
twenty-front package
- Adds a project.json file in the root of the project with the main
start command that start both twenty-server and twenty-front
applications concurrently
- Updates the script command of the root project with the start:prod
command (replacing the start command which will be used in dev with the
help of nx)
- Add a start:prod command in the twenty-front app, replacing the start
command (now used for dev purpose)

Issue ref #4645 

@charlesBochet @FelixMalfait please let me know how can I improve it

---------

Co-authored-by: Thaïs Guigon <guigon.thais@gmail.com>

packages/twenty-front/src/modules/ui/input/button/components/__stories__/Button.docs.mdx

@@ -21,8 +21,7 @@ Buttons are often used for form submissions and to toggle elements into view.
 ## Usage
 
 ```js
-
 import { Button } from '@/ui/button/components/Button';
 
-<Button title='Click me' />
-```
+<Button title="Click me" />;
+```