📖 [Docs]: Add full dependency tree with Mermaid diagrams

[Marius Storhaug (MariusStorhaug)]

Description

Adds DEPENDENCIES.md, a full dependency tree for Process-PSModule, and links it from the README.

The document maps every layer the workflow pulls in:

• Reusable workflows — the entry workflow.yml and the 15 stage workflows it calls.
• GitHub Actions — the PSModule composite actions and the third-party actions.
• Container image — the super-linter Docker action.
• PowerShell modules — the framework tree (GitHub → Context → Sodium, and more) and the tooling modules (Pester, PSScriptAnalyzer, Microsoft.PowerShell.PlatyPS, powershell-yaml, Markdown).
• Python packages — the MkDocs packages installed by Build-Site.

What's included

• Three Mermaid diagrams: workflow and action composition, action foundation with PowerShell modules, and the non-PowerShell toolchains.
• A dependency-type taxonomy and explicit boundaries for where the tree stops.
• Per-type reference tables with links, plus external registries and services, auxiliary workflows, and out-of-scope notes.
• A Dependency tree section in the README linking to the new document.

Notes

• Version pins are intentionally omitted; the workflow files under .github/workflows/ remain the source of truth.
• Documentation-only change with no release impact. Validated with markdownlint, codespell, and textlint against the repository linter configuration.

[Copilot]

Pull request overview

Adds a new documentation artifact that enumerates Process-PSModule’s dependency tree (workflows → actions → Docker image → PowerShell modules → Python packages) and links to it from the README so consumers can find the full dependency map.

Changes:

• Add DEPENDENCIES.md containing Mermaid diagrams and reference tables for the workflow’s dependency layers.
• Add a new “Dependency tree” subsection to README.md and include it in the README table of contents.

Reviewed changes

Copilot reviewed 2 out of 2 changed files in this pull request and generated 1 comment.

File	Description
README.md	Adds a “Dependency tree” section and TOC entry linking readers to the new dependency documentation.
DEPENDENCIES.md	Introduces the full dependency tree documentation with diagrams, boundaries, and per-layer reference tables.

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[Copilot]

Pull request overview

Copilot reviewed 2 out of 2 changed files in this pull request and generated no new comments.

[Copilot]

Pull request overview

Copilot reviewed 2 out of 2 changed files in this pull request and generated no new comments.