Document meta-ts usage in Oniro

added to epic &113

changed milestone to %goofy alpha

added teamsecurity label

set weight to 5

added teamdocumentation&UX label and removed teamsecurity label

changed milestone to %goofy beta

removed teamdocumentation&UX label

added teamsecurity label

set weight to 2

added Doing label

assigned to @mrybczyn

Done in oniro!367 (merged)

removed Doing label

closed