Support custom URI handler for clickable links in Desktop app in MacOS

[davide-baldo]

Blocking: #5577

In MacOs it's pretty easy to declare the support for custom URLs, just add this snipped to the pInfo file of the application. However, there is non trivial to intercept the event, as there is a multi-year ongoing discussion about these events, maybe by mapping the specific event rather than allowing any arbitrary event would be easier.

<key>CFBundleURLTypes</key>
<array>
        <dict>
                <key>CFBundleTypeRole</key>
                <string>Editor</string>
                <key>CFBundleURLName</key>
                <string>io.ockam</string>
                <key>CFBundleURLSchemes</key>
                <array>
                        <string>ockam</string>
                        <string>ockam-invite</string>
                </array>
        </dict>
</array>

And register the App as handler with:
/System/Library/Frameworks/CoreServices.framework/Versions/A/Frameworks/LaunchServices.framework/Versions/A/Support/lsregister -f /Applications/Ockam\ Desktop.app/

And confirm the registration with:
/System/Library/Frameworks/CoreServices.framework/Versions/A/Frameworks/LaunchServices.framework/Versions/A/Support/lsregister -dump URLSchemeBinding | grep ockam