build: Update BpyBuild to 0.5

[StandingPadAnimations]

This updates the toolchain to use BpyBuild 0.5, and with it some improvements have been made to our config and actions:

• BpyBuild config now uses the new version shorthands introduced in 0.4.X (which we didn't use to avoid breakage)
• Our override extension action now takes advantage of lib_bpybuild_ext to perform manifest verification and compatibility checks in the MCprep code. In addition, the action now does a search and replace in __init__.py for bl_info when building as an extension, which A. removes the need for a patch that constantly breaks and B. means the extension build will work out of the box
• MCprep now builds both an extension and legacy build. Although we'll likely only continue to offer the legacy build for the foreseeable future, it's nice to build both just for wider coverage.

This being a major release, there are definitely some bugs I've caught while working on this update (which will be fixed in the coming weeks), but nothing that can't be worked around (they're all "out of the box" bugs so to speak, we can easily work around them).

Edit October 11th, 2024: Pushed some bug fixes on https://github.com/Moo-Ack-Productions/bpy-build/pull/21

[StandingPadAnimations]

@TheDuckCow tagging you to let you know that this is ready for further review. BpyBuild 0.5.1 is also out, which fixes the main issues I caught while working on this (though BpyBuild 0.5 also works fine with this config, so I don't think it's necessary to raise the minimum)

[StandingPadAnimations]

I do have a few questions though:

• Assuming we're only providing legacy builds for the foreseeable future, is the updated config (where we build both an extension and legacy addon) fine as is, or would it be preferable to only build legacy builds?
• If we build both an extension and legacy addon, would it be preferable to have some slight name change for the extension build (again assuming we're only providing legacy builds in the long run), maybe something like "MCprep Extension Build"?
• Slightly off-topic, but I noticed it was suggested that the minimum be changed to 2.83, are we planning on dropping 2.8 to 2.82 with the update?