Adds type "embedded bot" to bot creation menu. Lets
users select a bot to run from a list of bots.
Currently, this list is hard-coded into the backend.
interface_type select menu will be used to choose the interface
for outgoing webhooks. It will be displayed only when the selected
bot type is OUTGOING WEBHOOK type. The default value is GENERIC
interface type (1).
Creating a new bot (by filling out the bots related fields and clicking
"Create bot" button) changes tab from "Add a new bot" to "Active bots".
This is done to make users know/confirm that the bot has been created and
the user can view it in this tab.
Fixes: #5731
"Add a new bot" UI used to be common in "Active bots" and
"Inactive bots". "Add a new bot" UI was below the list of all
active/inactive bots.
If there were more than a few bots was more than four, then the user
had to scroll down the entire list of bots to "Add a new bot", which
was annoying. This new model makes the UI look cleaner as well.
Flaskbotrc is a file containing config of all active
outgoing webhook bots. It is used to provide configuration
of all active outgoing webhook bots to zulip-bot-server.
Add 'Type of bot' option for bots by adding dropdown option in
settings->"Your bots". For now, this allows creating incoming webhook
bots in addition to default bots.
This will enable users to add a bot as an incoming webhook
(in addition to add full-featured bots).
With various minor tweaks and cleanups by tabbott.
Fixes#2186.
