Allow calendar names of infinite length.

Is your feature request related to a problem? Please describe.

I use the calendar URIs as their names, because it's actually easier for me to parse since I have a lot of calendars. For instance, I want to add https://blackboard.ccn.ac.uk/webapps/calendar/calendarFeed/ee02e6834f124a7780cc809c3b6b7664/learn.ics (don't worry, I've randomized some characters) but must truncate it to https://blackboard.ccn.ac.uk/webapps/calendar/calendarFeed//learn.ics for Nextcloud to accept the name change.

Describe the solution you'd like

Allow me to add a calendar name of any length.

Describe alternatives you've considered

0. Allowing users to see added calendars' origin URIs in their detail panes as https://github.com/nextcloud/calendar/issues/5464#issue-1886032426 suggests
1. Presenting the calendars in a table view with the origin URIs as a visible attribute

Additional context

This isn't a problem when using https://github.com/Alinto/sogo at somewhere like https://mail.defencegateway.mod.uk/SOGo/so//Calendar/view.

Read this issue alongside the referenced issue #5464, then locate where calendar names are validated or truncated in the Nextcloud Calendar app. Done means a calendar can be added with its full origin URI as the name, without truncation, and the existing calendar views and details still work.