Add a go workspace

[devguyio]

Description

Since the top-level directory of the repo isn't a Go module, it's problematic to open it in an IDE like GoLand as the expectations are that the top-level directory is a Go module. However, Go 1.18 introduced the Go workspaces concept that is perfect for our situation. Here, the top-level directory is a workspace and the cli is a Go module in that workspace.

How Has This Been Tested?

There are two ways to check if this works:

• On the top directory, issue some of the workspace aware commands such as go mod graph and see how it successfully lists the dependencies of the sub-module cli.
• Open the repo in GoLand or Intellij and see how it correctly recognizes the cil sub-module.

Merge criteria:

• [ ] The commits are squashed in a cohesive manner and have meaningful messages.
• [ ] Testing instructions have been added in the PR body (for PRs involving changes that are not immediately obvious).
• [ ] The developer has manually tested the changes and verified that the changes work

[openshift-ci[bot]]

[APPROVALNOTIFIER] This PR is NOT APPROVED

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[devguyio]

/close

[openshift-ci[bot]]

@devguyio: Closed this PR.

In response to [this](https://github.com/opendatahub-io/ai-edge/pull/261#issuecomment-2093356765): >/close Instructions for interacting with me using PR comments are available [here](https://git.k8s.io/community/contributors/guide/pull-requests.md). If you have questions or suggestions related to my behavior, please file an issue against the [kubernetes/test-infra](https://github.com/kubernetes/test-infra/issues/new?title=Prow%20issue:) repository.