Deep Linking Nextcloud Talk Links in Browser

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**Is your feature request related to a problem? Please describe.**
I wish that if someone sends me a nextcloud talk link to my iPhone, where nextcloud talk is installed it wouldn't open in safari, but would actually directly redirect me to the nextcloud talk app.

**Describe the solution you'd like**
I click on a link in an email or messenger (or similar) and it directly opens up the nextcloud talk app.

**Describe alternatives you've considered**
The current version works, but is a bit clunky. Alternatively you could add something to paste the link in in the nextcloud talk mobile client, so I can directly join the meeting from a pasted link into the nextcloud talk app. But this would be pretty horrible ux.

Start by tracing how Nextcloud Talk links are handled when opened from Safari or another app, then review the iOS app's deep-link configuration and related entry points. Done means a Talk link opened from email or messaging launches the app and routes to the linked conversation or meeting instead of remaining in Safari.

Written by the indexing model from the issue text.