claude/improve-prism-docs-VH8qW

[andyfischer]

• prism-framework-ui README: rewrite to match the actual exports; the
  previous README referenced a nonexistent QueryProvider, a missing
  React Query integration, and unexported Radix UI components.
• Clarify the /api/ path prefix rule: HTTP callers (including
  prism call, webFetch, and prism generate-api-clients) need /api/
  in the URL, but createEndpoint({ path }) must not include it. Fixed
  the README, endpoint-tools, source-directory-organization, and
  vite-setup examples accordingly.
• Fix the creating-mobile-apps cross-platform comparison table: desktop
  auth uses the getAuth option, not Express middleware.
• Fix the MigrationBehavior values listed in launch-configuration and
  database-setup to match the real values (strict, safe-upgrades,
  full-destructive-updates, ignore).
• Correct authorization to handle the
  getCurrentRequestContext() === undefined case and describe what
  requires: ['authenticated-user'] actually does (metadata only; the
  base framework does not auto-reject).
• generate-api-clients-config: reference /api/openapi.json and the
  port-assignment-based port resolution.
• Expand overview and the README doc index to mention previously
  undocumented guides (creating-mobile-apps, cors-setup, error-handling,
  generate-api-clients-config, metrics, source-directory-organization).
• vite-setup: proxy only /api, and document the matching webFetch
  usage that includes /api in the path (or in baseUrl).