Move packages to esp-hal repository

[jessebraham]

We're just going to keep forgetting about these packages, so I think it makes sense to move them in along with everything else. This is low-priority, I will take care of it when I get a chance. I'd also like to try and remove the git submodule first.

@MabezDev @bjoernQ please let me know if you have any objections to this, but I think it's the right call.

[bjoernQ]

I agree - t.b.h. I remember not touching them for some small changes because it's too cumbersome

[jessebraham]

• Remove core-isa-parser package, prepare to transfer packages #41
• Add xtensa-lx and xtensa-lx-rt packages esp-hal#1813