[WIP] Proof of Concept implementations for CompactLCU CompactState

[Jaybsoni]

Context:
As we develop the resource estimation functionality, we are realizing that the size of our systems of interest are larger than can be expressed in a pennylane circuit (at this stage). Furthermore, even at a high-level, expressing a gate or subroutine as a pennylane operation requires specifying the parameters and hyper-parameters which may not be required if we just want to obtain resources without simulation.

This "Input Problem" is addressed through the creation of two classes CompactLCU and CompactState which act as abstract inputs that can be passed into PL operations to perform resource estimates.

[github-actions]

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[Jaybsoni]

@soranjh, @willjmax

No need to review this PR, just tagging you to keep you informed.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 99.60%. Comparing base (808cde8) to head (36463a8).

Additional details and impacted files

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##           trotter_resources    #6749   +/-   ##
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  Coverage              99.60%   99.60%           
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  Files                    478      478           
  Lines                  45045    45045           
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  Hits                   44868    44868           
  Misses                   177      177           

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