Implement a WHIP client per RFC 9725, including Bearer token auth, Trickle ICE via HTTP PATCH, and ICE restart handling

Steps

1. Send an HTTP POST with an SDP offer (Content-Type: application/sdp) and an Authorization: Bearer <token> header to the WHIP endpoint URL
2. On success, read the session's resource URL from the response's Location header and the SDP answer from the response body, and use that resource URL for all subsequent session-scoped requests
3. Implement Trickle ICE by sending newly discovered local candidates via HTTP PATCH to the resource URL with Content-Type: application/trickle-ice-sdpfrag as they become available, rather than waiting to gather all candidates upfront
4. On network change or ICE failure, perform an ICE restart by sending a new PATCH with a fresh SDP offer fragment containing new ice-ufrag/ice-pwd values; on success, replace all previously known remote candidates with the new set returned in the response and preserve matching ice-options/ice-pacing/ice-lite attributes
5. Terminate the session with an explicit HTTP DELETE to the resource URL when the client shuts down, rather than only closing the local peer connection, so the media server frees resources immediately
6. For WHEP (egress/playback), mirror the same POST/PATCH/DELETE flow but negotiate a receive-only connection instead of a send connection