feat(es_extended): dd isNew state to Player stateBag on playerLoaded

Stores the isNew flag in the player's stateBag on server. 
On the client, you can get it like this:
```
 print(Player(source).state.isNew)
```

- [x]  My commit messages and PR title follow the [Conventional Commits](https://www.conventionalcommits.org/en/v1.0.0/) standard.
- [x]  My changes have been tested locally and function as expected.
- [x]  My PR does not introduce any breaking changes.
- [x]  I have provided a clear explanation of what my PR does, including the reasoning behind the changes and any relevant context.

[core]/es_extended/server/main.lua

@@ -331,12 +331,13 @@ AddEventHandler("playerDropped", function(reason)
     end
 end)
 
-AddEventHandler("esx:playerLoaded", function(_, xPlayer)
+AddEventHandler("esx:playerLoaded", function(_, xPlayer, isNew)
     local job = xPlayer.getJob().name
     local jobKey = ("%s:count"):format(job)
 
     Core.JobsPlayerCount[job] = (Core.JobsPlayerCount[job] or 0) + 1
     GlobalState[jobKey] = Core.JobsPlayerCount[job]
+    Player(xPlayer.source).state:set('isNew', isNew, true)
 end)
 
 AddEventHandler("esx:setJob", function(_, job, lastJob)