docs: add conceptual documentation for presence and heartbeat services - #489

docs: add conceptual documentation for presence and heartbeat services#489

Samuel-21-eng wants to merge 2 commits into

codebestia:maincodebestia/clicked:mainfrom

Samuel-21-eng:docs/presence-heartbeat-conceptsSamuel-21-eng/clicked:docs/presence-heartbeat-conceptsCopy head branch name to clipboard