openapi: Improve Bots documentation by dividing bots.
openapi: Improve Bots documentation by dividing bots.

Firstly divide the Bot schema into Bot and BasicBot for ease
of reusability. Also separate bot remove and bot delete into
two separate events.

hackerkid/zulip,punchagan/zulip,rht/zulip,punchagan/zulip,kou/zulip,kou/zulip,eeshangarg/zulip,kou/zulip,kou/zulip,hackerkid/zulip,andersk/zulip,zulip/zulip,hackerkid/zulip,hackerkid/zulip,eeshangarg/zulip,zulip/zulip,hackerkid/zulip,showell/zulip,zulip/zulip,punchagan/zulip,brainwane/zulip,punchagan/zulip,andersk/zulip,kou/zulip,andersk/zulip,zulip/zulip,brainwane/zulip,brainwane/zulip,eeshangarg/zulip,rht/zulip,eeshangarg/zulip,zulip/zulip,andersk/zulip,punchagan/zulip,punchagan/zulip,showell/zulip,hackerkid/zulip,punchagan/zulip,zulip/zulip,showell/zulip,showell/zulip,brainwane/zulip,rht/zulip,kou/zulip,showell/zulip,rht/zulip,eeshangarg/zulip,brainwane/zulip,kou/zulip,rht/zulip,rht/zulip,eeshangarg/zulip,brainwane/zulip,eeshangarg/zulip,showell/zulip,rht/zulip,brainwane/zulip,andersk/zulip,showell/zulip,andersk/zulip,hackerkid/zulip,zulip/zulip,andersk/zulip