Bugfix/dexter2206/zqs 770 add symbol ordering with fixed names order

[dexter2206]

This implements a variant of natural symbol ordering in which symbol names (without indices) are ordered in some custom fashion.

For instance, consider QAOA ansatz with symbols ordered as gamma_0 < beta_0 < gamma_1 < beta_1 <.....

This is an example of natural_keys_fixed_names_order(["gamma", "beta"]) key. In other words, we compare indices first, and names second, but names are compared according to some user-defined ordering.

[codecov]

Codecov Report

Merging #426 (1df5203) into dev (994ac0c) will increase coverage by 0.01%.
The diff coverage is 100.00%.

@@            Coverage Diff             @@
##              dev     #426      +/-   ##
==========================================
+ Coverage   90.92%   90.94%   +0.01%     
==========================================
  Files          63       63              
  Lines        3571     3577       +6     
  Branches      574      575       +1     
==========================================
+ Hits         3247     3253       +6     
  Misses        217      217              
  Partials      107      107              

Impacted Files	Coverage Δ
...python/zquantum/core/circuits/symbolic/__init__.py	100.00% <100.00%> (ø)
...python/zquantum/core/circuits/symbolic/_sorting.py	100.00% <100.00%> (ø)

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