chore(providers): refresh catalogs, free tiers, and hide stale ones

Update model lists and context lengths across free/apikey providers,
move bazaarlink, kilo-gateway, and kimchi into freeTier, demote llm7 to
apikey, and hide bluesminds, sambanova, zed, and mimo-free.

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

open-sse/providers/registry/mimo-free.js

@@ -1,5 +1,8 @@
+// Xiaomi ended the free MiMo channel ("MiMo free API service has ended").
+// Hidden until/unless a replacement (OAuth MiMo Platform) is wired.
 export default {
   id: "mimo-free",
+  hidden: true,
   priority: 50,
   hasFree: true,
   alias: "mmf",