Control codes and Layout

[willmcgugan]

• Change to segments to store information regarding control codes. This will allow output to be serialized for non terminals.
• New render system for layouts
• Ability to update regions of the screen (required for TUI work)

[codecov]

Codecov Report

Merging #1119 (86a3844) into master (9c56b20) will increase coverage by 0.00%.
The diff coverage is 100.00%.

@@           Coverage Diff            @@
##           master    #1119    +/-   ##
========================================
  Coverage   99.76%   99.77%            
========================================
  Files          67       69     +2     
  Lines        6073     6322   +249     
========================================
+ Hits         6059     6308   +249     
  Misses         14       14            

Flag	Coverage Δ
unittests	99.77% <100.00%> (+<0.01%)	⬆️

Flags with carried forward coverage won't be shown. Click here to find out more.

Impacted Files	Coverage Δ
rich/_inspect.py	100.00% <ø> (ø)
rich/columns.py	100.00% <ø> (ø)
rich/default_styles.py	100.00% <ø> (ø)
rich/highlighter.py	100.00% <ø> (ø)
rich/scope.py	100.00% <ø> (ø)
rich/tabulate.py	100.00% <ø> (ø)
rich/__main__.py	100.00% <100.00%> (ø)
rich/_ratio.py	100.00% <100.00%> (ø)
rich/align.py	100.00% <100.00%> (ø)
rich/bar.py	100.00% <100.00%> (ø)
... and 28 more

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