Added command line searching

[Tmarinus]

Code probably needs a bit of cleanup. I do a none async call to wikipedia search to get the first result. This is probably not ideal, however it is just 1 query so maybe it is acceptable.
However for me this is working, allowing me to add commands like:

/usr/bin/flatpak run --command=wike com.github.hugolabe.Wike -s television

My final use is a bash script that searches wikipedia for the selected text. Which I can invoke from gnome keyboard shortcut:

#!/bin/bash
query=$(xclip -o -selection primary)
if [ -n "$query" ]; then
	/usr/bin/flatpak run --command=wike com.github.hugolabe.Wike -s "$query" > /dev/null 2>&1 &
fi