[Feature] Add app capabilities feature which provides information on features and attributes of a function app #11574
Description
The goal of this feature is to provide rich metadata describing the features and attributes of a Function App. This metadata enables clients, integrations, and platform components to understand the specific roles and capabilities of a Function App, such as acting as a Web Server, MCP server, or exposing OpenAPI endpoints, based on its workload and integrations.
A new host admin endpoint will provide information from sources such as host.json configuration, extensions, and language workers.
Key components:
- Add flow for collecting from host.json
- Add flow for collecting from extensions
- Add flow for collecting from workers
- Implement a host admin endpoint