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>

.eslintrc.react.cjs

@@ -1,3 +1,5 @@
+var path = require('path');
+
 module.exports = {
   extends: [
     'plugin:@nx/react',
@@ -72,7 +74,9 @@ module.exports = {
       rules: {
         'storybook/no-uninstalled-addons': [
           'error',
-          { packageJsonLocation: '../../package.json' },
+          {
+            packageJsonLocation: path.resolve(__dirname, './package.json'),
+          },
         ],
       },
     },