Add configuration and deployment guides to docs (#9591)

docs/guides/README.md

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+# Configuration & Deployment Guides
+
+This directory contains comprehensive guides for configuring and deploying Proxmox VE containers using community-scripts.
+
+## 📚 Available Guides
+
+### [Configuration Reference](CONFIGURATION_REFERENCE.md)
+
+Complete reference for all configuration options, environment variables, and advanced settings available in the build system.
+
+**Topics covered:**
+
+- Container specifications (CPU, RAM, Disk)
+- Network configuration (IPv4/IPv6, VLAN, MTU)
+- Storage selection and management
+- Privilege modes and features
+- OS selection and versions
+
+### [Defaults System Guide](DEFAULTS_SYSTEM_GUIDE.md)
+
+Understanding and customizing default settings for container deployments.
+
+**Topics covered:**
+
+- Default system settings
+- Per-script overrides
+- Custom defaults configuration
+- Environment variable precedence
+
+### [Unattended Deployments](UNATTENDED_DEPLOYMENTS.md)
+
+Automating container deployments without user interaction.
+
+**Topics covered:**
+
+- Environment variable configuration
+- Batch deployments
+- CI/CD integration
+- Scripted installations
+- Pre-configured templates
+
+## 🔗 Related Documentation
+
+- **[CT Scripts Guide](../ct/)** - Container script structure and usage
+- **[Install Scripts Guide](../install/)** - Installation script internals
+- **[API Documentation](../api/)** - API integration and endpoints
+- **[Build Functions](../misc/build.func/)** - Build system functions reference
+- **[Tools Functions](../misc/tools.func/)** - Utility functions reference
+
+## 💡 Quick Start
+
+For most users, start with the **Unattended Deployments** guide to learn how to automate your container setups.
+
+For advanced configuration options, refer to the **Configuration Reference**.
+
+## 🤝 Contributing
+
+If you'd like to improve these guides or add new ones, please see our [Contribution Guide](../contribution/).