fix MetalView orientation

add streambase example

finishing streambase

adding streambase

send mediaframe directly to packetizer

refactor senders and fix rtsp commands

remove swift6 warnings and add adaptativebitrate class

fix url parser

refactor set url auth

add set auth depend of url auth and remove unused code

refactor url parser

Merge pull request #43 from pedroSG94/feature/offscreen-rendering

add metal interface on displayBase

allow attach preview to background render

add offscreen constructor and replaceMetalInterace