fix(html): prevent paragraph wrapping inside ListItemRun containers

[brettins]

Summary

• Text elements inside ListItemRun containers were being incorrectly wrapped in <p> tags
• This caused list items to be rendered as multiple separate paragraphs instead of a single inline list item
• Added 'ListItemRun' to the $withoutP check in Container.php alongside TextRun, Footnote, and Endnote

Example

Before (broken):

<p>Communicating </p>
<p><span style="font-weight: bold;">COMPANY NAME</span></p>
<p>'s</p>
<p> commitment to health and safety </p>

After (fixed):

Communicating <span style="font-weight: bold;">COMPANY NAME</span>'s commitment to health and safety

Test plan

• Import DOCX with list items containing multiple text runs (bold, italic, etc.)
• Verify HTML output has inline text instead of separate paragraphs

🤖 Generated with Claude Code

[brettins]

Implemented properly by @oleibman in oleibman@fd7606b - closing.