Reorganize docs API entries

[kataev]

What is this PR about?
Hello, while making previous PR i found what some modules doesn't import at all:

WARNING: [autosummary] failed to import pymc.constant_fold.
Possible hints:
* AttributeError: module 'pymc' has no attribute 'constant_fold'
* ModuleNotFoundError: No module named 'pymc.constant_fold'
* ImportError:
WARNING: [autosummary] failed to import pymc.math.det.
Possible hints:
* AttributeError: module 'pymc.math' has no attribute 'det'
* ModuleNotFoundError: No module named 'pymc.math.det'; 'pymc.math' is not a package
* ImportError:
WARNING: [autosummary] failed to import pymc.math.extract_diag.
Possible hints:
* ModuleNotFoundError: No module named 'pymc.math.extract_diag'; 'pymc.math' is not a package
* AttributeError: module 'pymc.math' has no attribute 'extract_diag'
* ImportError:
WARNING: [autosummary] failed to import pymc.math.matrix_dot.
Possible hints:
* ModuleNotFoundError: No module named 'pymc.math.matrix_dot'; 'pymc.math' is not a package
* ImportError:
* AttributeError: module 'pymc.math' has no attribute 'matrix_dot'
WARNING: [autosummary] failed to import pymc.math.trace.
Possible hints:
* ImportError:
* AttributeError: module 'pymc.math' has no attribute 'trace'
* ModuleNotFoundError: No module named 'pymc.math.trace'; 'pymc.math' is not a package
WARNING: [autosummary] failed to import pymc.model.core.model_to_networkx.
Possible hints:
* AttributeError: module 'pymc.model.core' has no attribute 'model_to_networkx'
* ModuleNotFoundError: No module named 'pymc.model.core.model_to_networkx'; 'pymc.model.core' is not a package
* ImportError:

Extension error (sphinx.ext.autosummary):

So i am looked in history and found what they removed long ago.

Bugfixes

• Fixes misspel in import shim around transforms.sum_to_1

Documentation

• Less errors while docs build

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📚 Documentation preview 📚: https://pymc--7030.org.readthedocs.build/en/7030/

[codecov]

Codecov Report

Merging #7030 (4cd807c) into main (ec70d86) will increase coverage by 4.25%.
Report is 7 commits behind head on main.
The diff coverage is 100.00%.

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #7030      +/-   ##
==========================================
+ Coverage   87.91%   92.16%   +4.25%     
==========================================
  Files         101      101              
  Lines       16849    16827      -22     
==========================================
+ Hits        14812    15509     +697     
+ Misses       2037     1318     -719     

Files	Coverage Δ
pymc/distributions/transforms.py	98.48% <100.00%> (+15.90%)	⬆️

... and 7 files with indirect coverage changes

[twiecki]

Did these go somewhere else?

[kataev]

You right, problem was in sampling.jax which doesn't import.
I split tables a little bit.