Merge branch 'new-event-store' into dev

CMakeLists.txt

include/mtx.hpp

include/mtx/events.hpp

include/mtx/events/collections.hpp

include/mtx/events/voip.hpp

include/mtx/responses.hpp

include/mtx/responses/turn_server.hpp

include/mtxclient/http/client.hpp

lib/http/client.cpp

lib/structs/events.cpp

lib/structs/events/collections.cpp

lib/structs/events/voip.cpp

lib/structs/responses/common.cpp

lib/structs/responses/turn_server.cpp

tests/messages.cpp

tests/responses.cpp