Feature request: inline mode for the bot

[esbraff]

There's feature called inline mode for telegram bots that allows to use a bot even in chats where this bot is not added. I can see this being very useful for one-time prompts that require no context, which is very common use case for LLMs in group chats.

I mainly request this feature for using LLMs, but it should be possible to make image generation requests and whatnot through menu that pops up when you try to interact with bot via inline mode.