Remove shapeless dependency in scala 3

[mrdziuban]

Fixes #1173

This removes the shapeless dependency completely from the scala 3 version of each project. Where there was a natural replacement, I swapped it in:

• shapeless.HNil is now scala.EmptyTuple
• shapeless.HList is now scala.Tuple
• shapeless.:: is now scala.*:
• N <: shapeless.Nat is now N <: Int
• shapeless.nat._N is now just N, taking advantage of literal types
• shapeless.Succ is now scala.compiletime.ops.int.S
• shapeless.Witness.Aux is now scala.ValueOf

There was no logical replacement for shapeless.tag.@@, so I removed code referencing it

[codecov]

Codecov Report

Merging #1193 (00dcf50) into master (10387aa) will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff           @@
##           master    #1193   +/-   ##
=======================================
  Coverage   92.69%   92.69%           
=======================================
  Files          65       65           
  Lines         835      835           
  Branches       26       30    +4     
=======================================
  Hits          774      774           
  Misses         61       61           

[fthomas]

Looks great, thanks @mrdziuban!

[mrdziuban]

Thanks @fthomas! Do you have any idea when you might plan to release a new version with the changes?

[fthomas]

0.11.0 with these changes has been released.