Savestates do not work as expected

[ScribbleTAS]

I found a number of issues with savestates:

• [x] Player velocity is not applied after loading a savestate
• [x] When storing the TASfile, the first tick is incorrect
• [x] When loading a savestate during playback, the filecommands after the savestate are not properly loaded
• [x] Loading a savestate across dimensions crashes the game
• [x] Savestates fail to apply the correct motion

All of this leads to desyncs