docs(slides): replace broken image gallery with Starlight LinkButtons

[Copilot]

The slides page rendered thumbnail images as broken/overlapping alt text due to missing image assets, making the page unusable.

Changes

• docs/src/content/docs/introduction/slides.mdx
  • Dropped custom <div>/<img>/<style> gallery (66 lines) entirely
  • Replaced with three native Starlight LinkButton components pointing to the April 7 PDF, February 24 PDF, and Interactive HTML deck

import { LinkButton } from '@astrojs/starlight/components';

<LinkButton href={`${import.meta.env.BASE_URL}slides/20260407%20-%20GitHub%20Agentic%20Workflows.pdf`} variant="secondary" icon="external">April 7, 2026 PDF</LinkButton>
<LinkButton href={`${import.meta.env.BASE_URL}slides/20260224%20-%20GitHub%20Agentic%20Workflows.pdf`} variant="secondary" icon="external">February 24, 2026 PDF</LinkButton>
<LinkButton href={`${import.meta.env.BASE_URL}slides/`} variant="secondary" icon="external">Interactive HTML</LinkButton>

[Copilot]

Pull request overview

Replaces a custom thumbnail-based slide gallery (which rendered as broken/overlapping alt text due to missing image assets) with Starlight-native LinkButton links to the available slide decks.

Changes:

• Removed the custom <div>/<img> gallery and inline CSS from slides.mdx.
• Added three LinkButton components linking to two PDFs and the interactive HTML deck under /slides/.

Show a summary per file

File	Description
docs/src/content/docs/introduction/slides.mdx	Removes broken thumbnail gallery and replaces it with Starlight LinkButton links to slide outputs generated under public/slides/.

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• Files reviewed: 1/1 changed files
• Comments generated: 0