Support set cursor style (DECSCUSR) #480
Description
We should support the following CSI code to allow more fine-grained control of the cursor and also allow configuration via .bashrc (eg. adding echo -e "\e[5 q" for blinking bar)
CSI Ps SP q
Set cursor style (DECSCUSR, VT520).
Ps = 0 -> blinking block.
Ps = 1 -> blinking block (default).
Ps = 2 -> steady block.
Ps = 3 -> blinking underline.
Ps = 4 -> steady underline.
Ps = 5 -> blinking bar (xterm).
Ps = 6 -> steady bar (xterm).
Both xterm and gnome-terminal support this out of the box. This can be done after the Parser refactor is complete #462.