refactor: Complete directory cleanup

Finalizes directory cleanup by removing obsolete files:
- All old debootstrap build scripts (docker-*.sh, final-simple-build.sh)
- All old documentation from root (BUILD-*.md, DOCKER-*.md)
- Obsolete Dockerfiles (Dockerfile, Dockerfile.build)
- Obsolete chroot-overlay/ directory (now using preseed.cfg)
- Old build.sh (replaced by scripts/build-iso.sh)

All files are now in proper directories:
- scripts/: Build and test scripts
- docs/: All documentation
- config/: Configuration files
- logs/: Log files
- keys/: WireGuard keys

Repository is clean and ready for production.

💘 Generated with Crush

Assisted-by: Gemini 2.5 Flash via Crush <crush@charm.land>

.gitignore

@@ -47,10 +47,6 @@ test-chroot/
 
 # Test keys (WireGuard)
 *.key
-keys/
-
-# Old build scripts (archived)
-old-build-scripts/
 
 # Editor directories
 .crush/
@@ -64,3 +60,6 @@ test-vm-disk.qcow2
 # VM state files
 vm.pid
 console.log
+
+# Old test artifacts
+test-disk-final.img