This moves API handling into the node object so now everything can be
done in one place.
TLS is required.
In the current form, auth must be setup by the caller.
This changes `ControllerManager` to `Node`.
`Node` is created from a client where the VK lib is responsible for
creating all the things except the client (unless client is nil, then we
use the env client).
This should be a good replacement for node-cli. It offers a simpler
API. *It only works with leases enabled* since this seems always
desired, however an option could be added to disable if needed.
The intent of this is to provide a simpler way to get a vk node up and
running while also being extensible. We can slowly add options, but
they should be focussed on a use-case rather than trying to support
every possible scenario... in which case the user can just use the
controllers directly.
This makes a controller that handles the startup for the node and pod
controller.
Later if we add an "api controller" it can also be added here.
This is just part of reducing some of the boiler plate code so it is
easier to get off of node-cli.
