added terminal themes: solarized light/dark

[isidroas]

Type of changes

• [ ] Bug fix
• [x] New feature
• [ ] Documentation / docstrings
• [ ] Tests
• [ ] Other

Checklist

• [x] 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

Colors taken from https://terminal.sexy/

Example output:

• light:
• dark

[isidroas]

Related to https://github.com/Textualize/rich/pull/2556

[willmcgugan]

I think these are best maintained in an independent package. Feel free to publish rich-terminal-themes.