Updates virtualenv docs page

[Burhan-Q]

Rationale

Splitting out changes introduced in #30 specifically for docs/getting_started/basic/virtualenv.md page.

Changes

• Adds annotations to code fenced content
• Adds tabbed content
• Fixes spacing between $`$ and $,$
• Adds code markers to package names in hyperlink text
• Adds Warning admonition
• Adds uv bullet and .venv setup steps
• Adds document front-matter and keywords

Testing

• Deployed locally with mkdocs to view changes
• Ran pre-commit for formatting

Note

Errors throw from pre-commit hooks likely due to mkdocs-material formatting

markdownlint.........................................................................Failed
- hook id: markdownlint
- exit code: 1

docs/getting_started/basic/virtualenv.md:105 MD046/code-block-style Code block style 
    [Expected: indented; Actual: fenced]

markdownlint-fix.....................................................................Failed
- hook id: markdownlint-fix
- exit code: 1

Screenshots

Tabbed content screenshot

Code block annotation screenshot

Collapsed

Expanded

Addition of uv and Warning admonition

[thesteve0]

Edited to fix the pre-commit errors so this is now in a new PR
#96

I messed up please stand b

[kevin-dimichel]

@Burhan-Q - Thank you for the contributions! To save you the toil of rebasing and fixing the markdownlint violation, I submitted #99 that include these changes (with pre-commit passing).

I'm going to close this PR since we just merged #99.

Sorry for the inconvenience.