docs: Add notes on audience to user-docs.md.
docs: Add notes on audience to user-docs.md.

showell/zulip,kou/zulip,andersk/zulip,punchagan/zulip,punchagan/zulip,synicalsyntax/zulip,punchagan/zulip,showell/zulip,andersk/zulip,Galexrt/zulip,rishig/zulip,mahim97/zulip,andersk/zulip,shubhamdhama/zulip,timabbott/zulip,zulip/zulip,andersk/zulip,eeshangarg/zulip,Galexrt/zulip,brainwane/zulip,andersk/zulip,showell/zulip,eeshangarg/zulip,kou/zulip,tommyip/zulip,shubhamdhama/zulip,timabbott/zulip,brainwane/zulip,zulip/zulip,timabbott/zulip,timabbott/zulip,rishig/zulip,tommyip/zulip,tommyip/zulip,hackerkid/zulip,dhcrzf/zulip,punchagan/zulip,kou/zulip,eeshangarg/zulip,brainwane/zulip,dhcrzf/zulip,rishig/zulip,synicalsyntax/zulip,kou/zulip,brockwhittaker/zulip,rht/zulip,timabbott/zulip,punchagan/zulip,Galexrt/zulip,shubhamdhama/zulip,hackerkid/zulip,brockwhittaker/zulip,showell/zulip,brainwane/zulip,dhcrzf/zulip,eeshangarg/zulip,shubhamdhama/zulip,kou/zulip,jackrzhang/zulip,jackrzhang/zulip,synicalsyntax/zulip,jackrzhang/zulip,jackrzhang/zulip,zulip/zulip,tommyip/zulip,tommyip/zulip,brainwane/zulip,rishig/zulip,eeshangarg/zulip,rht/zulip,shubhamdhama/zulip,shubhamdhama/zulip,zulip/zulip,brainwane/zulip,hackerkid/zulip,andersk/zulip,hackerkid/zulip,rht/zulip,dhcrzf/zulip,showell/zulip,mahim97/zulip,zulip/zulip,dhcrzf/zulip,jackrzhang/zulip,punchagan/zulip,brockwhittaker/zulip,synicalsyntax/zulip,rht/zulip,mahim97/zulip,dhcrzf/zulip,synicalsyntax/zulip,hackerkid/zulip,kou/zulip,showell/zulip,brainwane/zulip,tommyip/zulip,zulip/zulip,hackerkid/zulip,Galexrt/zulip,rht/zulip,jackrzhang/zulip,rht/zulip,jackrzhang/zulip,rishig/zulip,punchagan/zulip,Galexrt/zulip,eeshangarg/zulip,showell/zulip,synicalsyntax/zulip,mahim97/zulip,Galexrt/zulip,kou/zulip,rishig/zulip,rishig/zulip,mahim97/zulip,shubhamdhama/zulip,mahim97/zulip,hackerkid/zulip,brockwhittaker/zulip,Galexrt/zulip,timabbott/zulip,tommyip/zulip,zulip/zulip,andersk/zulip,brockwhittaker/zulip,rht/zulip,dhcrzf/zulip,timabbott/zulip,eeshangarg/zulip,synicalsyntax/zulip,brockwhittaker/zulip