Extend Static/StaticArrays tooling and adapt PowerMeasure

[oschulz]

This contains all changes for static tools that lived on the mt-15 branch - now updated, improved and with a lot of tests. I'll provide the basis for generating and handling static array variates and so on.

Slightly breaking, but we have accumulated a few breaking changes on main already.

[codecov[bot]]

Codecov Report

Attention: Patch coverage is 90.76923% with 12 lines in your changes missing coverage. Please review.

Project coverage is 58.98%. Comparing base (c840c01) to head (f1b41be).

Files with missing lines	Patch %	Lines
src/combinators/power.jl	72.00%	7 Missing :warning:
src/static.jl	95.74%	4 Missing :warning:
src/combinators/implicitlymapped.jl	50.00%	1 Missing :warning:

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #160      +/-   ##
==========================================
+ Coverage   56.32%   58.98%   +2.66%     
==========================================
  Files          44       44              
  Lines        1321     1414      +93     
==========================================
+ Hits          744      834      +90     
- Misses        577      580       +3     

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[oschulz]

The static tools have grown quite extensive and general, I'll probably pull them out into a separate package, part of this PR may go away again soon.

[oschulz]

Static tools will live in https://github.com/oschulz/StaticThings.jl, being registered now, will upate this PR when registration is complete.