docs: explain organization dependency inventory

[John-David Dalton (jdalton)]

LLM Description written by Codex:GPT-6

Adds a guide to the organization dependency inventory command and links it from the Usage section. It explains authentication, limit and offset behavior, output formats, and the difference between 2.x and 1.x dry runs.

Manual validation: real CLI help and dry-run processes passed for default and offset requests with temporary HOME and config directories. No authenticated inventory request was made.

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Note

Low Risk
No code changes; only README and new user documentation for an existing CLI command.

Overview
Documentation-only: adds docs/organization-dependencies.md and points readers there from the README Usage section instead of the generic Socket docs link.

The new guide covers socket organization dependencies: OAuth/API token access, manual pagination with --limit and --offset, table vs --json output (and that --json and --markdown are mutually exclusive), and how dry-run behavior differs between 2.x and 1.x.

^{Reviewed by Cursor Bugbot for commit d1f379b. Configure here.}