Rename several classes/behaviors to factory-style creators and adapt
call wiring and tests accordingly:
- Replace ConnectionManager class with createConnectionManager$ which
returns transports$, connectionManagerData$, connections$
- Convert MatrixLivekitMerger to createMatrixLivekitMembers$
(matrixLivekitMerger$)
- Rename sessionBehaviors$, localMembership$, localTransport$ to
createSessionMembershipsAndTransports$, createLocalMembership$,
createLocalTransport$
- Adjust participant types and hook up connectOptions$; expose join via
localMembership.requestConnect
- Update tests to use the new factory APIs
- Replace MatrixLivekitItem with MatrixLivekitMember, add displayName$
and participantId, and use explicit LiveKit participant types
- Make sessionBehaviors$ accept a props object and return a typed
RxRtcSession
- Update CallViewModel to use the new session behaviors, rebuild media
items from matrixLivekitMembers, handle missing connections and use
participantId-based keys
- Change localMembership/localTransport to accept Behavior-based
options, read options.value for enterRTCSession, and fix advertised
transport selection order
- Update tests and minor UI adjustments (settings modal livekitRooms
stubbed) and fix JSON formatting in locales
