questionable freecam improvements

[chri-k]

Type of change

• [x] Bug fix
• [x] New feature

Description

• compatibility between AirPlace and Freecam
• add player-relative position mode
• option to not modify the crosshair target when freecam is active
• option to ignore shift key in GUIs (since that is unaffected by GuiMove.sneak)
• held keybind to temporarily switch to moving the player instead of the camera
• remove chaotic rotation when window is not focused

Related issues

#5168 ( duplicated by #5495 ) #4663

p.s.: close all of the duplicate issues about Freecam causing crashes in the end dimension

How Has This Been Tested?

multiple times

Checklist:

• [x] My code follows the style guidelines of this project.
• [x] I have added comments to my code in more complex areas.
• [x] I have tested the code in both development and production environments.