Rewrite twiddle syntax on Scala 3 as extension methods

[Michael Pilquist]

This was partially done in #9 but I was unable to get all examples compiling. The goal is to remove these implicit conversions:

twiddles/core/shared/src/main/scala-3/org/typelevel/twiddles/Twiddles.scala

Lines 38 to 41 in 7a26b38

 implicit def toTwiddleOpCons[B <: Tuple](fb: F[B]): TwiddleOpCons[F, B] = new TwiddleOpCons( 
   fb 
 ) 
 implicit def toTwiddleOpTwo[B](fb: F[B]): TwiddleOpTwo[F, B] = new TwiddleOpTwo(fb) 

and the associated AnyVals.

See #11 for a potential starting point.

[Michael Pilquist]

Note part of #9 had to be rolled back due to #19