Add power and zipf RV

[Smit-create]

Fixes #1352
Fixes #1350
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[rlouf]

Looks good! Can you also add the distributions to the documentation?

I see that the tests fail in CI, but they don't on my machine. We need to figure out what's happening here; is NumPy's output consistent to begin with?

[codecov]

Codecov Report

Merging #1448 (775076d) into main (c433071) will increase coverage by 0.00%.
The diff coverage is 92.85%.

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #1448   +/-   ##
=======================================
  Coverage   74.86%   74.87%           
=======================================
  Files         194      194           
  Lines       50107    50123   +16     
  Branches    12098    12098           
=======================================
+ Hits        37514    37530   +16     
  Misses      10266    10266           
  Partials     2327     2327           

Impacted Files	Coverage Δ
aesara/compile/profiling.py	74.55% <ø> (ø)
aesara/tensor/basic.py	89.99% <ø> (ø)
aesara/tensor/elemwise.py	88.07% <ø> (ø)
aesara/tensor/var.py	87.82% <50.00%> (ø)
aesara/tensor/rewriting/math.py	86.11% <60.00%> (ø)
aesara/link/jax/dispatch/scalar.py	96.72% <100.00%> (ø)
aesara/link/numba/dispatch/elemwise.py	97.12% <100.00%> (ø)
aesara/scalar/basic.py	79.17% <100.00%> (-0.01%)	⬇️
aesara/tensor/inplace.py	100.00% <100.00%> (ø)
aesara/tensor/math.py	90.67% <100.00%> (-0.01%)	⬇️
... and 1 more

[Smit-create]

Is this good to merge?

[brandonwillard]

Is this good to merge?

Yes, thanks a lot!