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

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

nx.json

@@ -70,7 +70,6 @@
   "generators": {
     "@nx/react": {
       "application": {
-        "babel": true,
         "style": "@emotion/styled",
         "linter": "eslint",
         "bundler": "vite",