Fix sidebar TOC display for section headings with JSX components in ALKiln setup page

[Copilot]

The sidebar table of contents (TOC) was not properly displaying section headings that contained JSX components in the ALKiln setup documentation. This caused confusing entries where detailed section titles appeared as generic text like "test details" instead of the full descriptive names.

Problem:
Section headings using JSX components like <GTOYS/>, <AutoDIY/>, and <KittyLitter/> were not being rendered properly for TOC generation. For example:

• "GitHub+You™ test details" appeared as just "test details"
• "ALKilnInThePlayground™ tests" appeared as just "tests"
• "GitHub Sandbox™ tests (advanced)" appeared as just "tests (advanced)"

This made navigation confusing as multiple sections had the same generic labels in the sidebar.

Solution:
Replaced JSX components in section headings with their plain text equivalents:

• <GTOYS/> → "GitHub+You™"
• <AutoDIY/> → "ALKilnInThePlayground™"
• <KittyLitter/> → "GitHub Sandbox™"

Result:
The sidebar TOC now correctly displays full, descriptive section titles that help users navigate between different test setup methods and their details. All internal links continue to work properly.

Fixes #443.

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[nonprofittechy]

@plocket can you see if this fix is OK?

[BryceStevenWilley]

Ran this locally, for what it's worth, it's working. Copies the text to the header, but that's probably fine.

[plocket]

I was aware of this problem and I was hoping it would get fixed in docusaurus relatively quickly. It looks like it's a won't fix now. I think it's probably time to give up on this particular dream lol. I'm good with this PR.