lxqt - add virtual keyboard

Describe your issue

Virtual keyboard is missing.

Only cursor (touch) works, but is not enough.

What's the expected behaviour?

What's the current behaviour?

How to reproduce your issue?

Install lxqt

What device are you using?

xiaomi-pine

On what postmarketOS version did you encounter the issue?

• edge (master branch)

• v23.06

• v22.12

• I confirm that the issue still is present after running sudo apk upgrade -a

On what environment did you encounter the issue?

Environments

• Phosh
• Plasma Mobile
• Sxmo (Wayland/Sway) Please post the output of sxmo_version.sh
• Other: LXQt

How did you get postmarketOS image?

• from https://images.postmarketos.org
• I built it using pmbootstrap
• It was preinstalled on my device

What's the build date of the image? (in yyyy-mm-dd format)

Additional information

• Add virtual keyboard for usability.
• USB OTG appears not to work (tested against a mouse, keyboard and portable storage aka thumb drive)