Enable direct Markdown to PDF/DOCX conversion

[ssgamingop]

Description

Previously, the Docs Agent could create Markdown files but could not convert them to polished formats like PDF or DOCX (this was limited to HTML-sourced documents). This PR closes that gap by implementing a conversion bridge.

Changes

• Updated CreateDocument.py to automatically generate a hidden .source.html file when a Markdown document is created.
• Integrated markdown-it-py for robust Markdown-to-HTML rendering.
• Updated ConvertDocument.py documentation and logic to support the new workflow.
• Updated requirements.txt and pyproject.toml with the new dependency.

Why this is needed

Markdown is the "native" language of LLMs. Forcing users or agents to use HTML for styled documents adds friction.

This change allows users to:

• Stay in Markdown
• Still get high-quality, CSS-styled PDF and DOCX exports

How to test

1. Use the Docs Agent to create a document with:

   { "type": "markdown" }

2. Immediately call: ConvertDocument with output_format="pdf"
3. Verify that a high-quality PDF is generated from the Markdown source.

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If you want, I can also :contentReference[oaicite:0]{index=0}.

[chatgpt-codex-connector]

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[ssgamingop]

what is the issue why you guys are not merging my PR.