fix(registry): ship stylesheets as registry:file so shadcn add works

[Agnik47]

Closes #1049

Problem

npx shadcn add @react-bits/<Component>-JS-CSS fails with Unexpected token (1:0) right after "Checking registry", at the "Updating files" step.

It isn't specific to Lanyard — every one of the 292 -CSS registry entries is affected. -TW variants ship no stylesheet and were always fine.

The shadcn CLI runs every file it installs through its JavaScript/TypeScript transformer unless the file is typed registry:file. jsrepo.config.ts shipped each component as a whole folder, and a folder can't declare a type per file, so stylesheets went out as registry:component and got parsed as JavaScript. Unexpected token (1:0) is the parser choking on the first character of the CSS.

Fix

Stylesheets are now declared as registry:file, which shadcn copies verbatim. registry:file requires an explicit target, so it is set to @components/<Name>.css — shadcn resolves the @components alias to whatever the user configured in their components.json, which is where the component itself lands, so the component's relative ./<Name>.css import keeps resolving.

Because of the per-file type, variants that actually ship a stylesheet are now listed file by file instead of as a folder. Everything else still ships as a folder, so all -TW entries stay byte-identical.

public/r/ is regenerated (npm run registry:build). That rebuild also picks up ~57 entries whose committed content had drifted from src/ before this PR — those are content-only refreshes, no structural change.

Testing

• Reproduced first against the live registry with shadcn 4.16.0, 4.17.0 and 4.18.0 — all three fail on Lanyard-JS-CSS, Aurora-JS-CSS and AccordionGallery-JS-CSS, while Aurora-JS-TW installs fine.
• Re-ran npx shadcn add against the rebuilt registry on all three CLI versions, in both a JS project ("tsx": false) and a TS project ("tsx": true): Lanyard, Aurora, Hyperspeed, AccordionGallery, Magnet, BlurText, ASCIIText (-JS-CSS / -TS-CSS) plus Aurora-JS-TW and SplitText-TS-TW — all install cleanly. Stylesheets land next to their component and every relative import resolves; Hyperspeed still gets HyperSpeedPresets alongside it.
• Asserted across all 664 generated items: 292 CSS entries, each registry:file with a matching @components/<Name>.css target; every other file still registry:component with no target; every ./*.css import in a shipped source file has a matching shipped stylesheet, and no stylesheet is shipped unused.
• npm run build passes. npx prettier --check jsrepo.config.ts passes.
• npm run lint reports 46 errors, all pre-existing in src/**/*.jsx — eslint runs with --ext js,jsx, so it doesn't cover either file this PR changes.

Out of scope

• Lanyard's card.glb / lanyard.png still aren't shipped through the registry. They were already excluded before this change, and the component's docs tell users to supply them.
• Lanyard's dependencyResolution: 'manual' still leaves its dependencies empty — separate issue.