Support providing deployment configs in YAMLs

[qu1queee]

Idea:

This will help to inline ways for installing resources, across shipwright-io.

Context:

In shipwright-io/build we enable users to get a quick installation approach using kubectl apply -f a-nice-yaml-file. We should be supporting this here. So we can continue providing the same experience.

Note: As this one also install via package managers such as helm, we should support that in Build, see shipwright-io/build#356

[otaviof]

For the record, we can use helm to render all the installation resources in a single file, as per:

image/Makefile

Lines 129 to 132 in c65cf8f

	helm template \
	--namespace="$(NAMESPACE)" \
	--set="image=ko://github.com/shipwright-io/image/cmd/imgctrl" \
	./chart | \

We should reuse helm output to generate the "single file" release too.

[ricardomaraschini]

This is being address in #23