Dynamic commands

Static responses are answered directly by the bot; HTTP API commands call a URL you control and relay its JSON text field back to the chat. Give commands a category (e.g. "FAQ") and members can browse everything in it by sending a slugified version of that name — category "FAQ" is browsed with /faq, "Info Umum" with /info_umum. /search <text> is always available and searches every command's name, command, description, and category at once. Only group admins and approvedcommand operators can run any of these — a regular member gets a short "not available" reply instead.