Add a reference page for the @harperfast/vite plugin (and fix stale package name)

[Ethan-Arrowood]

Gap

There is no reference documentation for the Vite/React integration. The only mention in the entire docs build is a single bullet in reference/v5/components/overview.md (~line 135) that:

1. has no config examples (no config.yaml, no output/ssr keys, no pairing-with-static contract), and
2. uses the stale package name @harperfast/vite-plugin — renamed to @harperfast/vite in v1.0.0.

Impact

The @harperfast/skills rule serving-web-content cannot have its Vite/React half migrated to docs-generated (the static-files half already has good reference docs). Sourcing the current bullet as-is would also reintroduce the wrong package name. Part of the broader create-harper CLI docs cascade (see also creating-harper-apps).

Suggested fix

Add an atomic reference page for @harperfast/vite covering: the output/ssr config keys, pairing with the static plugin (shared output dir is the only contract), SPA vs SSR config.yaml, dev (harper dev, middleware-mode HMR) vs prod (harper run → vite build) behavior, and the install command. Fix the stale package name in components/overview.md.

_{Filed while auditing rule/doc coverage for @harperfast/skills. sent with Claude Opus 4.8}

[Ethan-Arrowood]

When this Vite reference page is written, it should also cover reading Harper data during SSR — surfaced in skills#65:

• The render entry (e.g. src/entry-server.tsx) runs inside Harper, so it can query tables directly during render (import { tables } from 'harper') and render data into the HTML — no client-side fetch/XHR.
• Keep harper external for SSR (ssr: { external: ['harper'] } in vite.config.ts) — node_modules/harper is symlinked to the running install, and symlinked deps aren't reliably auto-externalized for SSR.
• Embed the rendered state (e.g. an inline <script type="application/json">) for XHR-free hydration.

(The general "tables is process-wide / importable" point is being handled in #544; this is the Vite-specific wiring that needs this page as its home.)

_{sent with Claude Opus 4.8}