Adds docs/BUILD-DOCUMENTATION.md explaining:
- Directory structure (clean and organized)
- Complete build process (5 steps)
- Preseed configuration details
- ISO deployment procedures (bare metal and VM)
- Docker container usage (dev and test)
- Security features applied during installation
- Troubleshooting guide
- Next steps for deployment
This replaces all scattered old documentation with a single,
comprehensive reference for the ISO-based build system.
💘 Generated with Crush
Assisted-by: Gemini 2.5 Flash via Crush <crush@charm.land>
