Update Commands docs with the existing contexts

[ntsekouras]

What?

Docs update with the existing command's contexts.

[github-actions]

The following accounts have interacted with this PR and/or linked issues. I will continue to update these lists as activity occurs. You can also manually ask me to refresh this list by adding the props-bot label.

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Co-authored-by: ntsekouras <[email protected]>
Co-authored-by: t-hamano <[email protected]>

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[t-hamano]

LGTM!

[github-actions]

Flaky tests detected in 23cd33f.
Some tests passed with failed attempts. The failures may not be related to this commit but are still reported for visibility. See the documentation for more information.

🔍 Workflow run URL: https://github.com/WordPress/gutenberg/actions/runs/11739386157
📝 Reported issues:

• [Flaky Test] User Mention: should insert mention between two other words #48774 in /test/e2e/specs/editor/various/autocomplete-and-mentions.spec.js