feat: radical for algebras over rational function fields

[thofma]

No description provided.

[codecov]

Codecov Report

Attention: Patch coverage is 90.21739% with 9 lines in your changes missing coverage. Please review.

Project coverage is 76.40%. Comparing base (1d7bed2) to head (2cd6a42).
Report is 1 commits behind head on master.

Files with missing lines	Patch %	Lines
src/LinearAlgebra/Semilinear.jl	78.04%	9 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #1768      +/-   ##
==========================================
+ Coverage   76.38%   76.40%   +0.01%     
==========================================
  Files         361      362       +1     
  Lines      114238   114330      +92     
==========================================
+ Hits        87264    87351      +87     
- Misses      26974    26979       +5     

Files with missing lines	Coverage Δ
src/AlgAss/AbsAlgAss.jl	90.34% <100.00%> (+0.23%)	⬆️
src/AlgAss/radical.jl	95.54% <100.00%> (+0.75%)	⬆️
src/LinearAlgebra/Semilinear.jl	78.04% <78.04%> (ø)

... and 26 files with indirect coverage changes