This issue was originally dedicated to OSC 52 support, but it is about implementing far2l terminal extensions support now. For OSC 52 support see #356

For example,

echo -e "\033]52;c;$(base64 <<< hello)\a"

should send "hello" to clipboard. More detailed explanations:

mintty/mintty#258 (comment)
https://bugs.kde.org/show_bug.cgi?id=372116
https://gitlab.gnome.org/GNOME/vte/-/issues/125
microsoft/terminal#2946