Add command to set terminal size

[noelwelsh]

The terminal size can be set using the escape code CSI 8;<rows>;<cols>t. Add an effect, program operation (algebra), and documentation for this.

References:

• https://invisible-island.net/xterm/ctlseqs/ctlseqs.html and search for XTWINOPS
• https://github.com/crossterm-rs/crossterm/blob/e104a7cb400910609cdde36f322e3905c4baa805/src/terminal.rs#L371