WISH: a way to extend `dyn-print` at runtime

[hiiamboris]

I have to apply a series of kludges to the Spaces Console in absence of this feature to satisfy the following restrictions:

• dyn-print can only be extended by R/S code
• R/S code needs to call Red code, which requires a #call
• #call requires a path known at compile-time (so we already have an R/S wrapper around a static Red wrapper around a dynamic Red print function...)
• -e option produces code unknown at compile-time
• most reasonably advanced code (esp. Spaces) require -e flag to compile
• most print calls are baked in and cannot all be replaced at runtime without dyn-print
• I'm using console-on-demand which provides a console if it receives command line arguments like --help
• console-on-demand has to override print to spawn that console
• console-on-demand's print itself gets baked in in some places, as it is compiled (has to be, otherwise unreliable)
• console-on-demand itself is only relevant for Windows
• interpreted version cannot use any dyn-print, routines, R/S code, so it has to reload existing print invocations, even though it can't cover all of them

This ends up being an esoteric and brittle mess of code.

I would like to have a way to extend dyn-print without any R/S code, at any time.