[BUG] Markdown blockquotes cause crash on Windows

[X] I've checked docs and closed issues for possible solutions.
[X] I can't find my issue in the FAQ.

Describe the bug

Markdown blockquotes emit a U+258C (LEFT HALF BLOCK) character:

https://github.com/Textualize/rich/blob/26152e9cc95eef9c8f363d7bf1dfda426275348d/rich/markdown.py#L215-L217

On Windows, that this causes the error:

 File "C:\hostedtoolcache\windows\Python\3.10.11\x64\lib\site-packages\rich\console.py", line 1673, in print
    with self:
  File "C:\hostedtoolcache\windows\Python\3.10.11\x64\lib\site-packages\rich\console.py", line 865, in __exit__
    self._exit_buffer()
  File "C:\hostedtoolcache\windows\Python\3.10.11\x64\lib\site-packages\rich\console.py", line 823, in _exit_buffer
    self._check_buffer()
  File "C:\hostedtoolcache\windows\Python\3.10.11\x64\lib\site-packages\rich\console.py", line 2027, in _check_buffer
    legacy_windows_render(buffer, LegacyWindowsTerm(self.file))
  File "C:\hostedtoolcache\windows\Python\3.10.11\x64\lib\site-packages\rich\_windows_renderer.py", line 17, in legacy_windows_render
    term.write_styled(text, style)
  File "C:\hostedtoolcache\windows\Python\3.10.11\x64\lib\site-packages\rich\_win32_console.py", line 442, in write_styled
    self.write_text(text)
  File "C:\hostedtoolcache\windows\Python\3.10.11\x64\lib\site-packages\rich\_win32_console.py", line 403, in write_text
    self.write(text)
  File "C:\hostedtoolcache\windows\Python\3.10.11\x64\lib\encodings\cp1252.py", line 19, in encode
    return codecs.charmap_encode(input,self.errors,encoding_table)[0]
UnicodeEncodeError: 'charmap' codec can't encode character '\u258c' in position 0: character maps to <undefined>

https://github.com/fonttools/fontbakery/actions/runs/7931077595/job/21657155530

Platform

Click to expand

What platform (Win/Linux/Mac) are you running on? Windows What terminal software are you using? No terminal; we're in a GitHub CI job, so we're writing to standard output.

Textualize / rich

[BUG] Markdown blockquotes cause crash on Windows #3281