Resolve type instabilities when generating QuantumObjects

[albertomercurio]

This PR fixes #177.

here I used the multiple dispatch to manage the different types, instead of using several if conditions inside a single function. The only “dowside” (if we want to call it like that), is that the generation of BraQuantumObject and OperatorBraQuantumObject needs a vector instead of a transposed vector (actually a matrix). It is then conjugate-transposed inside the function.

I added a test of the type @inferred code…, just to test that there are no type instabilities.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 93.38%. Comparing base (4f94f9b) to head (bb99b86).

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #178      +/-   ##
==========================================
+ Coverage   93.35%   93.38%   +0.02%     
==========================================
  Files          28       28              
  Lines        2093     2102       +9     
==========================================
+ Hits         1954     1963       +9     
  Misses        139      139              

☔ View full report in Codecov by Sentry.
📢 Have feedback on the report? Share it here.