api: Fill out the sidebar with sections.
api: Fill out the sidebar with sections.

Most of these should be migrated from ReadTheDocs to this new site.

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