PIA Refactoring

[craigthomas]

This PR refactors the code around the Peripheral Interface Adapters. Previously, a set of unsigned byte objects were used to represent the state of the various PIA registers within the IO controller interface. The change here pulls out those bytes and instead creates a dedicated series of PIA objects to interface with different hardware devices. Unit tests updated to catch new conditions.

[codecov]

Codecov Report

Attention: Patch coverage is 50.31056% with 80 lines in your changes missing coverage. Please review.

Project coverage is 57.61%. Comparing base (cd43b31) to head (7fa91fd).

Files with missing lines	Patch %	Lines
.../craigthomas/yacoco3e/components/IOController.java	33.89%	39 Missing ⚠️
...java/ca/craigthomas/yacoco3e/components/PIA1a.java	44.44%	7 Missing and 3 partials ⚠️
...java/ca/craigthomas/yacoco3e/components/PIA1b.java	60.00%	5 Missing and 3 partials ⚠️
...java/ca/craigthomas/yacoco3e/components/PIA2b.java	42.85%	6 Missing and 2 partials ⚠️
...n/java/ca/craigthomas/yacoco3e/components/PIA.java	58.82%	6 Missing and 1 partial ⚠️
...java/ca/craigthomas/yacoco3e/components/PIA2a.java	50.00%	4 Missing and 2 partials ⚠️
...a/ca/craigthomas/yacoco3e/components/Keyboard.java	90.00%	1 Missing and 1 partial ⚠️

Additional details and impacted files

@@             Coverage Diff              @@
##               main     #128      +/-   ##
============================================
- Coverage     57.63%   57.61%   -0.03%     
- Complexity     1018     1028      +10     
============================================
  Files            62       67       +5     
  Lines          4506     4546      +40     
  Branches        527      514      -13     
============================================
+ Hits           2597     2619      +22     
- Misses         1828     1843      +15     
- Partials         81       84       +3     

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