Handle replicant / message set events properly

Show NodeCG and OBS versions in status request

Provide basic HTML landing page

Various QoL improvements to avcomms

Better define config for bridge / bot

Fix logging to not use sprintf (failing tests)

Tidy up in shoutproxy

Properly defer ephemeral interaction for alert-end (whoops)

Minor replicant rename

to better reflect new content

Actions: Don't attach manifest to initial image builds