Exporting console content to SVG

[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

Adds ability to export SVGs from Rich containing console contents.

[codecov-commenter]

Codecov Report

Merging #2101 (8520041) into master (6dfb81d) will decrease coverage by 0.00%.
The diff coverage is 100.00%.

@@            Coverage Diff             @@
##           master    #2101      +/-   ##
==========================================
- Coverage   99.48%   99.47%   -0.01%     
==========================================
  Files          72       72              
  Lines        7334     7412      +78     
==========================================
+ Hits         7296     7373      +77     
- Misses         38       39       +1     

Flag	Coverage Δ
unittests	99.47% <100.00%> (-0.01%)	⬇️

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

Impacted Files	Coverage Δ
rich/__main__.py	100.00% <ø> (ø)
rich/__init__.py	100.00% <100.00%> (ø)
rich/_lru_cache.py	100.00% <100.00%> (ø)
rich/console.py	99.21% <100.00%> (+0.06%)	⬆️
rich/repr.py	100.00% <100.00%> (ø)
rich/terminal_theme.py	100.00% <100.00%> (ø)
rich/traceback.py	99.55% <100.00%> (ø)
rich/segment.py	99.01% <0.00%> (-0.33%)	⬇️

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[willmcgugan]

Fantastic.

Could we move the styles from inline in to the <style> tag. You may be able to reuse the code from export_html.

[willmcgugan]

LGTM!

Would you mind updating the SVG in the docs to use the stylesheet.

Feel free to merge once that's done.