refactor: migrate project bootstrap to xtask

[gomnitrix]

Draft PR for early feedback on an xtask-based bootstrap implementation.

[gomnitrix]

Hi @tisonkun, thanks again for the previous reviews.

I went back to my earlier implementation and tried to address the points you raised back then, simplify some parts of the code, and also incorporate some ideas from the recent Python script you added.
I also tried adding a bootstrap --cleanup option to provide a clean way to remove the bootstrap code.

I’m not entirely sure if this approach makes sense yet, so for now I’m mainly looking for a quick sanity check. If you have a chance to take a look, I’d really appreciate any feedback. If it looks roughly okay, I can polish it up and make this ready for a proper review.

Thanks!

[tisonkun]

Thanks for your contribution! Updated and merging ...

[gomnitrix]

Thanks for your contribution! Updated and merging ...

Thanks for your help! I saw your updates, and the renaming and overriding feel like a much better approach than using features. Learned a lot, thank you! :)