FreeRDP3 support

[TheCrealm]

Currently XPipe has a launch integration for xfreerdp (FreeRDP2).
I suggest support for xfreerdp3 (FreeRDP3) because v2 is legacy and does not support the newest features.
There are some CLI changes, so xfreerdp and xfreerdp3 are not interchangeable.

[crschnick]

Do you have a link to a list of changes that are incompatible? For reference, the current implementation does not use that many switches: https://github.com/xpipe-io/xpipe/blob/master/app/src/main/java/io/xpipe/app/rdp/FreeRdpClient.java

[crschnick]

Actually that was fairly easy, I added support in the v19 branch