This is just enough to connect all of the apply engine parts together into
a functional whole which can at least attempt to apply a plan. There are
various gaps here that make this not fully work in practice, but the goal
of this commit is to just get all of the components connected together in
their current form and then subsequent commits will gradually build on this
to make it work better.
Signed-off-by: Martin Atkins <mart@degeneration.co.uk>
This is just some initial sketching of how the applying package might do
its work. Not yet finished, and I'm expecting to change about the
execution graph operations in future commits now that the main plan/apply
flow is plumbed in and so it's easier to test things end-to-end.
Signed-off-by: Martin Atkins <mart@degeneration.co.uk>
