fix: dual-mount blogroll at /blogrollapi and /rssapi

/blogroll static page hardcodes /blogrollapi/api/* calls.
/news static page hardcodes /rssapi/api/* calls.
Both must work simultaneously.

- Revert mountPath to /blogrollapi (restores /blogroll page)
- Patch init() to also register publicRouter at /rssapi via a
  thin Indiekit.addEndpoint() alias (fixes /news page)
- /api/feeds alias retained for /news page (maps to listBlogs)

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

indiekit.config.mjs

@@ -425,7 +425,7 @@ export default {
       checked: false
     },
     "@rmdes/indiekit-endpoint-blogroll": {
-      mountPath: "/rssapi",
+      mountPath: "/blogrollapi",
       syncInterval: 3600000,
       maxItemsPerBlog: 50,
       maxItemAge: 7,