Configuring hugo settings to match cli-experimental settings

[unrolled]

This PR is part of the larger docs clean up issue: #4338

I went through the cli-experimental/site/config.toml file and brought over any necessary changes to match the styling and functionality of the SIG-CLI docs site. I also copied the cli-experimental/netlify.toml as it will be needed in the near future.

Couple of questions for the reviewers:

1. Is the copyright text correct for the site?
2. I left a question about locales on slack that may apply to this config cleanup
3. Any additional setup for netlify needed?

[linux-foundation-easycla]

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• ✅ login: unrolled / name: Cory Jacobsen (3bc5ca4)

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[KnVerey]

/ok-to-test

[KnVerey]

Looks like we could use [build.environment] to set this for all envs? https://docs.netlify.com/integrations/frameworks/hugo/#hugo-version

[KnVerey]

Is the copyright text correct for the site?

Since this is what the old site is using, let's keep it for now. But I'll drop a question with SIG Docs, since it's not what kubernetes.io uses. Slack thread

Any additional setup for netlify needed?

When we are preparing to launch, we'll need to actually request the Netlify site using this process: Subproject Site Requests. There are a few more Netlify settings in the example that we likely want, notably the different commands for the non-production environments.

[KnVerey]

/lgtm
/approve

Since the site isn't live yet, let's get these improvements in. Additional tweaks can be made in a follow-up, notably once we hear back from SIG Docs.

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This pull-request has been approved by: KnVerey, unrolled

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