Cli update

[carsonmh]

Issue link

closes #284

What changes have been made

Codeflare CLI, adding a command line interface that allows similar functionality to the Codeflare SDK. Changes to SDK include:

• creating Cluster object from yaml function
• refactored some parts of the Codeflare SDK
• allow app wrapper creation to be optional

Verification steps

-codeflare --help to see a list of all commands, run each one to test

• You can run unit tests with pytest

Checks

• [x] I've made sure the tests are passing.
• Testing Strategy
  • [x] Unit tests
  • [x] Manual tests
  • [ ] Testing is not required for this change

[openshift-ci[bot]]

[APPROVALNOTIFIER] This PR is NOT APPROVED

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[openshift-merge-robot]

PR needs rebase.

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