Upstream into bevy

[JMS55]

I (and other bevy developers) would love to have this functionality in bevy itself. If you're up to it, please do open a PR!

[kulkalkul]

Thanks! I'd love to open a PR, though I wonder if there are issues with my implementation (one thing I need clarification on is the text cache I'm using). I suppose the only way to find out is by opening a PR 😅. I'll have to read contribution guidelines and come up with a version that's compatible with bevy. Depending on my availability, I could do that at the end of this month or next month.

[JMS55]

No rush! Feel free to open a draft PR and ask for help, that's what the PR process is for :)

[kulkalkul]

Update on this 🎉
We talked in Discord and thought it would be cool to make required changes and upstream this for bevy 0.13. Towards end of the month, I'll finish my work with #8, merge it, and upgrade it to 0.12. Then I'll work on a PR to upstream this. Related thread: https://discord.com/channels/691052431525675048/1170975253967671418