[NEW][EE] Omnichannel Priorities & SLAs (#27083)

Co-authored-by: Martin Schoeler <martin.schoeler@rocket.chat>
Co-authored-by: Cauê Felchar <11652381+cauefcr@users.noreply.github.com>
Co-authored-by: Aleksander Nicacio da Silva <aleksander.silva@rocket.chat>
Co-authored-by: Tiago Evangelista Pinto <tiago.evangelista@rocket.chat>
Co-authored-by: Diego Sampaio <chinello@gmail.com>
Co-authored-by: Murtaza Patrawala <34130764+murtaza98@users.noreply.github.com>
Co-authored-by: Filipe Marins <filipe.marins@rocket.chat>
Co-authored-by: murtaza98 <murtaza.patrawala@rocket.chat>