[Opulencechuks]

Closes #1326

### Summary
Makes the Rate Limit page dynamic and per-API at `/marketplace/:apiId/rate-limits`, replacing the hardcoded fictional "GrantFox Wave Compute API" page at `/rate-limit`.

### Changes
- **Data Model**: Added optional `rateLimits` field to `APIItem` and populated mock data across sample APIs.
- **Route Predicate**: Added `isMarketplaceSubpage` in `src/routeMatchers.ts` to cleanly route subpages like `/sla` and `/rate-limits` to `App`, with unit tests in `src/routeMatchers.test.ts`.
- **Custom Router & Redirect**: Updated `src/renderRoute.tsx` to handle subpages properly, and updated `src/App.tsx` to route `/marketplace/:apiId/rate-limits` and redirect legacy `/rate-limit` requests to `/marketplace` with an explanatory toast.
- **Route Catalogue**: Removed `/rate-limit` from `src/config/routeCatalogue.ts` and `routePrefetchers` in `App.tsx` so 404 search does not recommend obsolete paths.
- **Component**: Refactored `RateLimitCard.tsx`:
  - Dynamically fetches the API entry from `fetchCatalog(signal)`.
  - Dynamically formats page title, document title, and breadcrumb path.
  - Dynamically hides empty columns (Burst limit, Concurrent connections).
  - Handles loading, empty ("This provider has not published rate limits"), not-found, and error states.
  - Added accessible table caption naming the API and locale-aware number formatting.
  - Removed all GrantFox literals.
- **Navigation**: Added a "View rate limits" link to the API Detail page sidebar.
- **Tests**: Replaced and extended `RateLimitCard.test.tsx` and created `routeMatchers.test.ts`.

### Test Output

✓ src/routeMatchers.test.ts (7 tests)
✓ src/pages/RateLimitCard.test.tsx (8 tests)
✓ RateLimitCard
✓ shows a loading state first
✓ renders three rows and a caption naming the API
✓ omits Burst and Concurrent columns when no tier has them
✓ shows the not-published state when the API has no rateLimits
✓ shows a not-found panel for an unknown id
✓ builds a breadcrumb from the API name whose hrefs all resolve to existing routes
✓ contains no GrantFox literals
✓ ROUTE_CATALOGUE
✓ has no dead /rate-limit entry

[drips-wave]

@Opulencechuks Great news! 🎉 Based on an automated assessment of this PR, the linked Wave issue(s) no longer count against your application limits.

You can now already apply to more issues while waiting for a review of this PR. Keep up the great work! 🚀

Learn more about application limits