Add IRC channel to get involved page
In response to #16 (closed), I added information about the IRC channel to the 'get involved' page.
I also collected info on how to join via matrix, however I don't know any way to succinctly express how to join and I'm not sure a lenghty explanation about matrix is something we want to have on that page.
Anyway I'm putting my findings here, so that we might add it in the future:
- the channel name is #freenode_#briar:matrix.org
- apparently there is also an internal id that some clients might need to join: !DSFhcVWSWRGSBGWzXy:matrix.org
- from the element.io app, it is possible to join the bridge channel by typing
/join #freenode_#briar:matrix.orginside any channel