docs(dir): introduce cli context

[tkircsi]

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Preview deployed to: https://blogs.agntcy.org/drafts/docs-dir-cli-context/

Last updated: commit 22bc5431652e60adcc2876d7c5477fcff5d58134

[jchatfranklin]

Great job, Tibor! Clear and to the point. Only one question: There's one sentence that appears to be missing a word or contains a typo; I couldn't be certain. Here's the sentence as is:

oidc-gateway is the edge component that lets users and automation access Directory from outside the cluster using standards-based identity.

Editorial quibble: In these cases I prefer to use "enables" instead of "lets;" the latter tends to imply some sort of security or permission aspect, which I think doesn't apply in this case. But you can keep it as is if you prefer, or if I'm mistaken.

All great otherwise.

[tkircsi]

@jchatfranklin Thank You for the the suggestion!