MC1.20-0.5.0

Change set since MC1.19-0.4.0:

82b5d6b: Bump version number to 0.5.0
c147892: Adjust waypoint things
d4b8058: Fix compilation
6c4d9ce: Restore old GUI
65bac2c: Re-enable test mod
2447712: Restore GitHub Action functionality
e9e0e18: Merge pull request #3 from qyl27/1.20-forge
ca4f1a6: Merge pull request #2 from qyl27/dev/new-gui
e6b02a2: WIP: data structure.
5941f65: WIP: new gui.
d412c96: Update mods.toml.
0d16bd5: Update test examples.
367776e: Update to 1.20.1.
1788914: Delete access transformer config since it is not needed now
a24791b: Adjust tooltip render of waypoints