Add option for bi-directional door swing (using rotation tween)

[grgp]

This adds the ability for doors that rotate using the Tween Parameters to open bi-directionally, depending on the position of the interactor (player). It also adds an example door in the demo scene, as you can see in the video.

Note that this PR's implementation is based on the existing open_rotation_deg and closed_rotation_deg, which seems to denote the global transform's rotation, not the local transform's.

screen-recording-2024-01-17-at-033009_QjA5fsoL.mp4

Also for reference, there was an issue here for bi-directional door animations. This PR is different because it doesn't use custom animations.

[Phazorknight]

Thank you! this looks super elegant codewise.

The door script has had some changes in the experimental branch, so I will try to properly review this today or tomorrow and then hopefully merge it in.