fix: make nexus lowercase

[Bojan Rajh (bojanrajh)]

Summary

This PR standardizes folder for the Nexus product by making it lowercased.

Related links

#2265

Checklist

• I reviewed affected links, code samples, and cross-references, including PageRef references where relevant.
• I added or updated redirects in .gitbook.yaml if pages were moved, renamed, or deleted.
• I updated .wordlist.txt (and sorted it) if spellcheck flags new legitimate terms.
• Any required dependent changes in downstream modules have already been merged and published.
• This pull request is ready for review.

Notes

[github-actions]

⚠️ Moved markdown files detected. Please ensure redirects are updated in .gitbook.yaml file.

[Copilot]

Pull request overview

This PR standardizes the Nexus product folder name to lowercase. The diff presents the lowercase products/nexus/ files as new additions and adds a directory redirect from the previous uppercase path so existing links continue to resolve.

Changes:

• Adds the Nexus documentation set under products/nexus/ (index, getting-started, workflow, integration, security).
• Adds a products/Nexus/ → products/nexus/ redirect in .gitbook.yaml.

Reviewed changes

Copilot reviewed 1 out of 6 changed files in this pull request and generated no comments.

Show a summary per file

File	Description
products/nexus/index.md	Nexus overview page (lowercase path).
products/nexus/getting-started.md	Getting Started page under the lowercase folder.
products/nexus/workflow.md	Workflow Builder page; nav.title still says "Nexus".
products/nexus/integration.md	Business Central integration page.
products/nexus/security.md	Security & troubleshooting page.
.gitbook.yaml	Adds redirect from old uppercase products/Nexus/ path.

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