The rune-intro partial renders a section with the package, title, description and bar

Acceptance Criteria

• The partial renders the eyebrow (package linked to its plugin page, or Core), an <h1> title and the description as the blurb
• The bar's left group shows, in order and each only when it applies: a Composition badge with a puzzle icon, a status badge when the status is not stable, and the schemaType badge linked to its schema.org page; a native rune shows no kind badge
• The bar's right group shows an Install action for a plugin rune and a Source action for every rune, so a core rune shows Source alone
• The Install action opens a drawer with npm install <package>, the plugins entry for refrakt.config.json and a link to the plugin's overview page, built by the partial from package
• The Source action opens a file-ref drawer on the record's source
• A test asserts that the <h1> inside the include still sets the page title, TOC and heading index
• A test asserts that file-ref reads a path substituted from a $row value
• On a docs page the section reads as a page header, light and dark, at 1280px and 390px; any adjustment is made with the section's attributes, not site CSS
• _partials/README.md documents the partial beside rune-attributes.md