fun writeStringWithColor(string: String, charColor: Int, bgColor: Int): AsciiPanelView
Write a string to the cursor's position with the specified foreground and background colors. This updates the cursor's position but not the default foreground or background colors.
charColor - the foreground color or null to use the default
bgColor - the background color or null to use the default
Return
this for convenient chaining of method calls