feat: pass the source file name to the preload filter for fonts

[Nic-Polumeyv]

Implements the name property from #16424 (comment).

name is looked up from the Vite client manifest where the fonts arrays are built, so the filter receives the exact source file name. Deriving it from the emitted path was wrong two ways, the bundler sanitizes characters (inter+bold.woff2 is emitted as inter_bold.<hash>.woff2) and content-identical assets are emitted once under a single name. The union includes name for font only, kit never calls preload with type asset.

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[pkg-svelte-dev]

Install the latest version of @sveltejs/kit from 0f6fcc8:

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Open in pkg.svelte.dev: https://pkg.svelte.dev/repos/kit/pr/16443

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Latest commit: 0f6fcc8

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[Nic-Polumeyv]

Merged #16445 back in, the diff is feature-only now.

[Nic-Polumeyv]

Reworked, name is now looked up from the Vite manifest instead of derived from the emitted path, so the filter receives the exact source name and the sanitization caveat is gone. Also narrowed name to font only, kit never calls preload with type asset.