Issue #2902187 by amateescu, timmillwood, Sam152, webchick, Manuel Garcia, xjm, plach, DuneBL, larowlan, Bojhan, jibran, Berdir, jojototh: Provide a way for users to moderate content

Issue #2779647 by alexpott, Sam152, catch, scookie, yoroy, pericxc, timmillwood, tacituseu, jhedstrom, xjm, bojanz, tstoeckler: Add a workflow component, ui module, and implement it in content moderation

Issue #2725533 by timmillwood, alexpott, amateescu, webchick, dixon_, larowlan, dawehner, catch, Crell, Bojhan, jibran, Wim Leers, agentrickard, Berdir: Add experimental content_moderation module