Add config option to switch between the new and old command syntax

[wizard-28]

Issue created by @saenai255

[wizard-28]

Why do we need to do this? Why maintain backwards compatibility? We've already decided not to do so.

[wizard-28]

Why do people need to switch? Why isn't it the default?

[Elsie19]

I assume the website will be finished before the rewrite, so it would be nice to just have a variable that can switch to the rewrite syntax when it's released

[wizard-28]

So, the website will have it's own config file? Or will this be a toggle in the website itself?

[Elsie19]

The website config

[wizard-28]

So a file in this repository?

[Elsie19]

This has been completed for a long time.