feat(docs): add OpenAPI API reference from oRPC contract

Generate an OpenAPI 3.1 spec from the oRPC contract at build time
using @orpc/openapi, then use fumadocs-openapi to render interactive
API reference pages grouped by tag (Titles, Episodes, Seasons, etc.).

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

apps/native/eas.json

@@ -9,7 +9,6 @@
     },
     "development": {
       "developmentClient": true,
-      "distribution": "internal",
       "ios": {
         "simulator": true
       }
@@ -21,7 +20,6 @@
         "ascAppId": "6760432427"
       },
       "android": {
-        "serviceAccountKeyPath": "./google-service-account.json",
         "track": "internal"
       }
     }