FR: Expose reservations via API

[Yeradon]

If im not mistaken, currently reservations can only be managed using the telegram bot. I would love to see this functionality exposed with a generic API, which is independent from the notification channel used. That way reservations could be integrated into arbitrary thirdparty applications (e.g. homeassistant, standalone ui).

I suggest a simple web-api (which would require at least a basic level of authentication). If you agree with the idea, i could contribute an implementation.

[Der-Henning]

Hi @Yeradon.
Yes, the reservation feature is in an experimental state and could use some further development.
I like the idea of enabling the integration with as many use cases as possible.
So feel free to contribute. I will review your code.