docs(npm): add package README

[ajay-bhargava]

Summary

• add a concise README for the @planmonster/olkcli npm package
• identify the upstream fork and access-token credential injection

Testing

• npm pack --dry-run ./npm/olk

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Reviewing files that changed from the base of the PR and between 4855326 and 78ff240.

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• npm/olk/README.md

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📝 Walkthrough

Walkthrough

The README now describes @planmonster/olkcli as an olkcli fork supporting delegated Microsoft Graph token injection through OLK_ACCESS_TOKEN, without reading or persisting stored OAuth credentials.

Changes

CLI documentation

Layer / File(s)	Summary
Credential handling documentation npm/olk/README.md	Adds package description, OLK_ACCESS_TOKEN usage, and OAuth credential handling details.

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