Add default opening of the NC url by the mobile app, not the browser

### Is your feature request related to a problem? Please describe.
Typically when I receive a link to the file on my smartphone, I am clicking over it and it opens the browser with the NC web portal. It is difficult to navigate over it, especially on the devices with small screen.

### Describe the solution you'd like
In case the NC mobile app is installed to prompt to open the link with the app and let a user to let automatically open this link by the NC client. This relates to folders and files. In case of files, the file should be highlighted or opened if there's such an opportunity.

### Describe alternatives you've considered
To let user choose either to open the link with the browser or NC client.

### Additional context
Opening of the file or highlighting the file should be additionally discussed, as their opening may require additional apps to be installed, eg Deck, Talk etc.

In case of self-hosting it should be some additional information sent inside of the link in order to understand that this link should be open by NC client. By now it may be identified by the construction **https://domainname.tld/f/idnumber**. Letting NC client to be prompted to be a standard browser for all links is not desired, in my opinion.