Rework World/Environnement sync

[Deewarz]

Curently, weather set and time are mixed between World and Environment depending on the location and also in the way the synchronization is done.

https://github.com/MafiaHub/MafiaMP/blob/master/code/server/src/core/builtins/world.h

We should simplify and bring everything together on World.

Also, time flow is automaticaly managed by the game.
We should give this ownerrship to the scripter who can update the time manually at the pace he wants. (like it's done currenlty in the gamemode) (this also avoids having to synchronize our stuff with the game)

Tasks

Remove Environment thing

• Cleanup and sync weather set and time on the World directly

Give scripter ownership on the time flow

• Reverse time flow native (in Lua we do it via game.gfx:SetTimeFlowSpeed(0)) => Reverse more WeatherManager2 stuffs #64
• Disable the time flow when the user run the game

SDK API

• Rename SetWeather to SetWeatherSet
• Add GetWeatherSet
• Rename setDayTimeHours to SetTime
• Check the value passed to SetTime is a float between 0.0 and 24.0
• Add GetTime (hook: C_WeatherManager2__GetDayTimeHoursAddr)
• Attach SetWeatherSet, GetWeatherSet, SetTime and GetTime to the World node module
• Update gamemode with the new naming