Add optional Adanos market sentiment integration #5765

Description

Add an optional Adanos integration that lets workflows retrieve stock and crypto market sentiment, trending assets, and aggregate market sentiment from Reddit, X / FinTwit, financial news, and Polymarket.

The integration would use each user's own ADANOS_API_KEY, keep credentials in user-only fields, and expose read-only tools through a native Sim block. I maintain Adanos and can implement the integration, tests, icon, and generated documentation following the repository conventions.

Proposed operations

• Get stock sentiment by source
• Get Reddit crypto sentiment
• List trending stocks or crypto assets
• Get aggregate stock or crypto market sentiment

Additional context

API documentation: https://api.adanos.org/docs