feat: Include directive with prefixing

[gabyx]

It would be nice to have a prefixing mechanism for include statements, such that when importing another file

!include-with-prefix "sub-" a/b/c

such that the task one in a/b/c will be imported with sub-one.

[casey]

The way I'd like to solve this in the long term is with modules, see #929.

[gabyx]

Sounds awesome! Good project! Monorepos are The use case … the thing is if just does not reinvent the wheel, e.g. bazel… (gives me 🥶 only looking at their doc … 😂)