Support for tel:-Uri in Url field

### Checks

- [x] I have read the Wiki, searched the open issues, and still think this is a new feature.

### Explain the problem clearly and succinctly:

In my keepass file are also phone banking connections. Sadly neither share nor a clickable link offers ASOP's/LineageOS (Android 15, GAPPS free) to open the url in the dialer. Some e.g. desktop keepass manager offers this feature.

### Describe the solution you'd like:

Best clickable link like a normal "href" html tag. Let the os decide if the uri is ledgit.

### Describe alternatives you've considered:

Tested this with a html website which offer a simple href="tel:+1234567890" link which without problems in different browsers and phone apps.

### Additional context:

_No response_

Start by locating the Url field and its existing link-handling entry point in the Android app, then trace how URI schemes are opened. The work is done when a tel:+1234567890 value is presented as a clickable link and the operating system can route it to an appropriate dialer, with behavior checked on Android 15.

Written by the indexing model from the issue text.