feat: add str, repr and getitem to BasisState

[ajberdy]

Issue #, if available:

Description of changes:

Add a few convenience methods to the BasisState class

Testing done:

Manual and unit testing

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[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Comparison is base (dedfb72) 100.00% compared to head (44dd05e) 100.00%.

Additional details and impacted files

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##              main      #808   +/-   ##
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  Coverage   100.00%   100.00%           
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  Files          129       129           
  Lines         8388      8396    +8     
  Branches      1870      1870           
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+ Hits          8388      8396    +8     

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[jcjaskula-aws]

Can we add

def index(self, value: Any) -> int:
  return list(self.state).index(value)

and maybe a pop member function too?

[ajberdy]

Can we add

def index(self, value: Any) -> int:
  return list(self.state).index(value)

and maybe a pop member function too?

I'm not sure about the necessity of an index function, I would say we should add it once we need it. Especially since there's only two values in the iterable. I could more so see the argument for pop, but I think it's slightly ambiguous which side gets popped.

[jcjaskula-aws]

We could define __bool__ to use BasisStates in conditions.

Suggested change

	def __bool__(self):
	return any(self.state)