- Pulls logic for defaulting to active namespace (K8S) moved UP to CLI during
  flag default calculation.
- Pushes logic of deciding between f.Namespace vs f.Deploy.Namespace down into
  implementations.
- Updates some tests which needed to have their environment cleared.
- Refactors Pipelines tests to use client API.
- Removes namespaces as a state variable all structures, instead passing as
  an argument.
- Moves FromTempDirectory to testing package for use outside cmd.

- Utilize the `make check-embedded-fs` target
- Renames schema-check to check-schema to match other checks
- Delegates runtime and builder matrix logic to test suite impl
- Relocates converage reformatting to workflows

- Adds test-all target
- integration and e2e tests clearly state they run unit tests too
- integration and e2e tests clear cache
- Adds a check-embedded-fs target
- Adds several missing .PHONY lines

- Default builder and pusher set to embedded Host Builder/Pusher(oci)
- Most tests clear environment
- Environment defaults can be controlled via environment variables
- Tests which require back-compat `git` binary actively check and skip
  when running with a cleared environment (both integration and unit).
- Bugfixes for when run in tandem with E2E tests
- Ignores go-created directories in the default home path (testdata)

- Updates docs and moves package doc to a README.md
- Sets up MatrixRuntimes and MatrixBuilders as an opt-in filter
- Implements delete
- Bugfixes when run via make