Refactor: NginxProxyManager

[MickLesk]

✍️ Description

-- currently in draft --

• rework NPM
• remove unneeded old messages (fork me...)

✅ Prerequisites (X in brackets)

• Self-review completed – Code follows project standards.
• Tested thoroughly – Changes work as expected.
• No breaking changes – Existing functionality remains intact.
• No security risks – No hardcoded secrets, unnecessary privilege escalations, or permission issues.

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🛠️ Type of Change (X in brackets)

• 🐞 Bug fix – Resolves an issue without breaking functionality.
• ✨ New feature – Adds new, non-breaking functionality.
• 💥 Breaking change – Alters existing functionality in a way that may require updates.
• 🆕 New script – A fully functional and tested script or script set.
• 🌍 Website update – Changes to website-related JSON files or metadata.
• 🔧 Refactoring / Code Cleanup – Improves readability or maintainability without changing functionality.
• 📝 Documentation update – Changes to README, AppName.md, CONTRIBUTING.md, or other docs.

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🔍 Code & Security Review (X in brackets)

• Follows Code_Audit.md & CONTRIBUTING.md guidelines

📋 Additional Information (optional)

[github-actions]

⚠️ The script ct/nginxproxymanager.sh failed with the following message:

Failure in line 123 while executing command 'pnpm install'

[MickLesk]

Will be integrated in UV Migration PR #4961