[feature-request] Add ability to query the Subscribe URLs

[jmotes-lapero]

Would it make sense to add the ability to query the Subscribe URLs? Most local Calendar clients such as Microsoft Outlook require an ICS file and I don't want to have to replicate the functionality of generating the ICS file on the fly in my frontend framework (Next.js) if I don't have to.

EDIT: I found this library that might negate the need for this however:

https://github.com/add2cal/add-to-calendar-button-react

Thought I'd mention in case it helped anyone else!