feat: ingest own capabilities from responses

[isekovanic]

🎫 Ticket: https://linear.app/stream/issue/XYZ-123

📑 Docs: https://github.com/GetStream/docs-content/pull/

💡 Overview

Draft PR for now until I finish writing integration tests for this.

Noteworthy things (very rough overview, will write in more detail):

• Reimplements throttling as the Chat implementation was broken (would often end up in timeout loops and skip on queries altogether)
• Lifts the capabilities state upwards (on the client) as we have no other way to consume it properly
• Updates hooks
• On activities not containing own_capabilities, it fetches them in a throttled manner

TO-DOs:

• Check activity related component state updates whenever capabilities update
• Swap out queryFeeds with the new own_capabilities endpoint whenever it's added on the backend
• Integration tests
• Change useOwnCapabilities so that it simply returns the state directly (forwards compatibility)
• Update docs

📝 Implementation notes