Update to 1.21.5

[modmuss50]

trafficstars

• [x] Get the mod to compile
• [ ] Make sure I didnt break anything when porting
• [ ] Update the docs pages related to the changes
• [ ] appendTooltip is now deprecated, should it be using components?

Please feel free to make PRs into this branch.

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[its-miroma]

superseded by #347