Add Yaw to GPS Waypoint Location

[test137E29B]

Description

Currently GPS Waypoints use the Block's Location (and thus Yaw). This means the player always is south facing when spawning as the default is 0.

Proposed changes

Preserve the Yaw of the player when creating GPS Marker Waypoints.

Related Issues (if applicable)

N?A

Checklist

• I have fully tested the proposed changes and promise that they will not break everything into chaos.
• I have also tested the proposed changes in combination with various popular addons and can confirm my changes do not break them.
• I have made sure that the proposed changes do not break compatibility across the supported Minecraft versions (1.16.* - 1.20.*).
• I followed the existing code standards and didn't mess up the formatting.
• I did my best to add documentation to any public classes or methods I added.
• I have added Nonnull and Nullable annotations to my methods to indicate their behaviour for null values
• I added sufficient Unit Tests to cover my code.

[github-actions]

Your Pull Request was automatically labelled as: "🎈 Feature"
Thank you for contributing to this project! ❤️

[github-actions]

Slimefun preview build

A Slimefun preview build is available for testing!
Commit: b46a56ca

https://preview-builds.walshy.dev/download/Slimefun/4021/b46a56ca

Note: This is not a supported build and is only here for the purposes of testing.
Do not run this on a live server and do not report bugs anywhere but this PR!

[JustAHuman-xD]

lgtm