Replace recommonmark with myst-parser to fix GFM table rendering in docs

[Copilot]

recommonmark doesn't support GitHub-Flavored Markdown tables, causing the Standalone vs npm comparison table to render as raw pipe-delimited text instead of an HTML table.

Changes

• docs/requirements.txt: Replace recommonmark >= 0.7.1 with myst-parser >= 0.18.0
• docs/conf.py: Replace recommonmark extension with myst_parser; remove the now-unnecessary AutoStructify import and setup() hook

Original prompt

---

This section details on the original issue you should resolve

<issue_title>Docs Rendering Issue : Standalone vs NPM Comparison Table</issue_title>
<issue_description>The comparison table in the project docs (Standalone vs NPM) is not rendering correctly.

Link: https://django-tailwind.readthedocs.io/en/latest/standalone-vs-npm.html
Screenshot:

</issue_description>

<agent_instructions>Fix the table so it looks perfect when rendered as HTML</agent_instructions>

Comments on the Issue (you are @copilot in this section)

• Fixes Docs Rendering Issue : Standalone vs NPM Comparison Table #242

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