feat: read scopes and contexts in env:get, env:list, and dev

[jasonbarry]

Summary

This PR adds support for environment variable scopes and contexts for the env:get, env:list, and dev commands.

env:get and env:list support both the --scope and --context flags if the site has been configured with the new Environment Variables experience:tm:, aka Envelope. If the site is not configured with Envelope and either of those flags are passed, an error message will print. If this site is not configured with Envelope and neither of those flags are passed, it will behave as it normally has.

A new Scope column has been added to env:list if the site is on Envelope:

The --context flag for netlify dev is now supported, which will pull in values from Envelope while respecting the precedence of context values in netlify.toml.

One caveat is that there will be a duplicate GET request sent to Envelope due to this change in netlify/config. Since we're adding context and scope options on the CLI level, I thought it would make sense to move the requests to happen in the CLI. Once all the calls to Envelope land in CLI, it should be safe to remove in netlify/config to remove the redundancy.

Fixes https://github.com/netlify/pillar-workflow/issues/755
Fixes https://github.com/netlify/pillar-workflow/issues/734

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Test instructions

• Checkout this branch and install dependencies
• Remove your existing global install -- if installed with npm, npm uninstall -g netlify-cli
• npm link
• Give env:get, env:list, and dev a whirl. I recommend trying with a site opted-in to the new Env Vars experience in the UI (enable in Labs)

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[github-actions]

📊 Benchmark results

Comparing with 7317269

Package size: 228 MB

⬇️ 0.00% decrease vs. 7317269

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[jasonbarry]

Per this conversation

[jasonbarry]

@codebyuma I would very much appreciate a copy review in this PR for options outputted by the --help flag, and log/error messages 🙏 . In the diff, I suggest clicking the "Show file tree" button and looking at .js files in src/commands/*. The copy in the docs/ directory is auto-generated from the commands.

[codebyuma]

It's exciting to see this coming together! I haven't finished reviewing/testing but I need to run for an appointment, so I thought I'd submit the comments I have so far. I'll come back to this when I'm back

[jasonbarry]

@netlify/netlify-dev this is ready for a code review now, if one of y'all can spare a moment! ❤️

[lukasholzer]

THIS is an outstanding PR 👏 Very nicely documented and well tested! 💯
🐳

[jasonbarry]

Why thank you @lukasholzer!! I realized a test was failing due to some capitalization of strings in logging 🤦 here's the change. Would you mind doing a re-review?