Conversion of Segments to Windows Console API calls on legacy Windows platform

[darrenburns]

Type of changes

• Bug fix
• New feature
• Documentation / docstrings
• Tests
• Other

Checklist

• I've run the latest black with default args on new code.
• I've updated CHANGELOG.md and CONTRIBUTORS.md where appropriate.
• I've added tests for new code.
• I accept that @willmcgugan may be pedantic in the code review.

Description

Currently we depend on Colorama, which converts ANSI to Windows Console API calls in the context of legacy Windows terminals. This change removes the Colorama dependency, and has Rich directly call the Windows Console API.

• This should speed things up a little on older systems, since Colorama is no longer parsing ANSI codes.
• This change is implemented at the Segment level - so the calls to the API are done slightly earlier than before.
• We support a larger surface of the Console API now. For example, control sequences for showing and hiding the cursor are now handled where they previously weren't (we may see less flickering as a result), and the title of the terminal can be set.

Closes #1991

Comparing new vs old

rich.syntax - New on left, old (Colorama) on right

rich.color - left column is this branch, right column is master

rich.palette - left this branch, right master

rich.progress - left this branch, right master - no difference in the amount of flickering, however, on master the cursor occasionally flashes on screen.

[codecov-commenter]

Codecov Report

Merging #1993 (862416a) into master (75f4637) will decrease coverage by 0.26%.
The diff coverage is 91.73%.

@@            Coverage Diff             @@
##           master    #1993      +/-   ##
==========================================
- Coverage   99.81%   99.54%   -0.27%     
==========================================
  Files          71       73       +2     
  Lines        7058     7294     +236     
==========================================
+ Hits         7045     7261     +216     
- Misses         13       33      +20     

Flag	Coverage Δ
unittests	99.54% <91.73%> (-0.27%)	⬇️

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

Impacted Files	Coverage Δ
rich/segment.py	99.34% <ø> (ø)
rich/console.py	99.63% <88.00%> (-0.37%)	⬇️
rich/_win32_console.py	90.22% <90.22%> (ø)
rich/_windows_renderer.py	100.00% <100.00%> (ø)

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[USLTD]

@darrenburns I have a question.
Why do you define wrappers over Win32 API calls? I don't think it is needed

[darrenburns]

@UltraStudioLTD The wrapper abstracts legacy Windows console API calls behind an easier to understand and more Pythonic interface, so that the rest of Rich doesn't need to know anything about legacy Windows APIs. The purpose of this PR is to drop the dependency on Colorama, and handle older Windows systems in a slightly more performative way.

[willmcgugan]

Great! Just a few requests.

[willmcgugan]

@darrenburns Just looking in to styles a bit more.

According to the colorama docs, it will interpret bold as bright, and also dim as normal intensity. We should probably do the same. Colorama doesn't support the "reverse" style, but I think we could do that quite easily by swapping "fore" and "back". Would you mind making those changes?

[darrenburns]

@willmcgugan Made those changes in #2019

[willmcgugan]

LGTM