Tests for QUA programs

[stavros11]

Adds a prototype for testing QUA programs generated by the driver without requiring connection to the instrument. It is based on comparing the AST of the generated program with a target program.

Planned for a later release, most likely 0.2.1, but would be helpful to add tests for various cases even before the release of 0.2.0, to identify potential bugs.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 80.15%. Comparing base (d07eb62) to head (c5929c1).

Additional details and impacted files

@@             Coverage Diff             @@
##              0.2    #1039       +/-   ##
===========================================
+ Coverage   51.52%   80.15%   +28.63%     
===========================================
  Files          56       56               
  Lines        2746     2752        +6     
===========================================
+ Hits         1415     2206      +791     
+ Misses       1331      546      -785     

Flag	Coverage Δ
unittests	80.15% <100.00%> (+28.63%)	⬆️

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