The completion functions only need the API-client, and not all of
the CLI. However, passing the API-client as argument would mean
that the API-client is initialized early, which may not be what
we want, so instead, defining an APIClientProvider interface to
preserve the behavior of initializing when needed only.
While updating, also simplify stack.format to only require an
io.Writer.
Signed-off-by: Sebastiaan van Stijn <github@gone.nl>
20d1b661bc