📖 [Docs]: Context README is now a complete landing page with concepts and usage

[Marius Storhaug (MariusStorhaug)]

The Context README is now a complete landing page. It explains what a context is, how contexts are grouped into encrypted vaults, and how to store and retrieve data — so users and module authors can understand and adopt the module without leaving the page.

What changed

• Restored the conceptual overview — "What is a context?" describes the model, SecureString handling, and how Get-ContextInfo exposes metadata without decrypting.
• Restored the vaults model — including the $HOME/.contextvaults/<VaultName>/ directory-structure diagram and the isolation guarantees between vaults.
• Restored the encryption note — Context encrypts data at rest with NaCl via the Sodium module, installed automatically.
• Added a ## Usage showcase — a Set-Context / Get-Context round-trip plus metadata inspection and vault/context management, all using real exported commands.
• Trimmed the developer guide — the long "Implementation Guide for Module Developers" is condensed to the unique quick-start, wrapper pattern, and key points; content that merely duplicated command help was dropped.
• Standardized installation — uses Install-PSResource -Name Context.
• Removed the ## Contributing section.

Technical details

• Updates README.md only.
• Aligns with the PSModule landing-page standard while preserving the conceptual material this feature-rich module needs.
• Command-by-command reference remains in PowerShell help and the generated docs at psmodule.io/Context.

[Copilot]

Pull request overview

This PR standardizes README.md into a lightweight landing page for the Context PowerShell module, shifting detailed usage guidance to PowerShell help and the generated documentation site.

Changes:

• Replaced the long-form README content with a short module summary and minimal usage entry points.
• Simplified installation instructions and added a dedicated documentation section pointing to psmodule.io.
• Added contributing guidance pointing readers to the issue tracker.

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[github-actions]

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MARKDOWN	Pass ✅
NATURAL_LANGUAGE	Pass ✅
POWERSHELL	Pass ✅
PRE_COMMIT	Pass ✅
SPELL_CODESPELL	Pass ✅
TRIVY	Pass ✅
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Super-linter summary

Language	Validation result
CHECKOV	Pass ✅
GITHUB_ACTIONS	Pass ✅
GITLEAKS	Pass ✅
GIT_MERGE_CONFLICT_MARKERS	Pass ✅
MARKDOWN	Pass ✅
NATURAL_LANGUAGE	Pass ✅
POWERSHELL	Pass ✅
PRE_COMMIT	Pass ✅
SPELL_CODESPELL	Pass ✅
TRIVY	Pass ✅
YAML	Pass ✅

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[Copilot]

Pull request overview

Copilot reviewed 1 out of 1 changed files in this pull request and generated no new comments.

[Copilot]

Pull request overview

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

[Copilot]

Pull request overview

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

[github-actions]

Super-linter summary

Language	Validation result
CHECKOV	Pass ✅
GITHUB_ACTIONS	Pass ✅
GITLEAKS	Pass ✅
GIT_MERGE_CONFLICT_MARKERS	Pass ✅
MARKDOWN	Pass ✅
NATURAL_LANGUAGE	Pass ✅
POWERSHELL	Pass ✅
PRE_COMMIT	Pass ✅
SPELL_CODESPELL	Pass ✅
TRIVY	Pass ✅
YAML	Pass ✅

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