Add classes: Actions + Divider + Illustration + InfoTable + Stat, Add utilities (needs docs)

src/routes/getting-started/illustrations.md

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+---
+title: Using illustrations
+---
+
+TODO
+
+Use `.illustration` class.

src/routes/getting-started/utils.md

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+---
+title: Built-in utilities
+---
+
+TODO
+
+## ... ago
+
+## Simplify number
+
+## Markdown & XSS
+
+### Parsers
+
+- sanitize
+- markdown
+- markdownInline
+- markdownXSS
+
+### Markdown
+
+Put parsed HTML into a `<div>` with `class="markdown"`.
+
+## Permissions
+
+## Versions