Create Default OutputRendering Implementation

[cpisciotta]

Changes

Move TerminalRenderer code into the OutputRendering extension. When a concrete OutputRendering type doesn't implement a formatting method, it should fall back to a default implementation. Today, the default formatting methods are the ones used and defined by TerminalRenderer.

[codecov]

Codecov Report

Attention: Patch coverage is 82.50000% with 21 lines in your changes are missing coverage. Please review.

Project coverage is 86.08%. Comparing base (d927949) to head (c2de572).

Files	Patch %	Lines
...rces/XcbeautifyLib/Renderers/OutputRendering.swift	82.50%	21 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #275      +/-   ##
==========================================
- Coverage   86.08%   86.08%   -0.01%     
==========================================
  Files          14       14              
  Lines        1567     1545      -22     
==========================================
- Hits         1349     1330      -19     
+ Misses        218      215       -3     

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