feat(sdk): Add SlidingSync::(clear_and_subscribe|unsubscribe)_to_rooms#6012

Hywan merged 3 commits intomatrix-org:mainmatrix-org/matrix-rust-sdk:mainfrom

Hywan:feat-sdk-sliding-sync-room-unsubscriptionsHywan/matrix-rust-sdk:feat-sdk-sliding-sync-room-unsubscriptionsCopy head branch name to clipboard