Add option to disable renderer

[meowgorithm]

This PR introduces WithoutRenderer, a ProgramOption for disabling the Bubble Tea standard renderer. When WithoutRenderer is set Bubble Tea won't manage rendering and print and log statements will, by default, go straight to standard output.

This opens up a few possibilities:

• Daemon Mode: It's now possible for your Bubble Tea program to also operate as a daemon in addition to a TUI. See the daemon-tui-combo example for an example implementation.
• Non-TTY Mode: If output’s not a TTY your Bubble Tea program can simply print or log output to stdout. See the daemon-tui-combo example for an example implementation.
• General Purpose Application Development: It's now possible to use the Bubble Tea framework for general purpose application development. That is to say, your can take advantage of this implementation of The Elm Architecture to build other types of applications, like servers, GUIs and so on.