Add comprehensive phase system, types, and treefile support for deb-bootc-compose

- Add internal/phases/ with complete phase management system
- Add internal/types/ with core data structures
- Add internal/treefile/ for OSTree treefile generation
- Update examples with YAML configurations
- Update .gitignore to properly exclude test artifacts and build outputs
- Update dependencies and configuration files

examples/debian-bootc-minimal.json

@@ -1,102 +1,82 @@
 {
   "name": "debian-bootc-minimal",
   "version": "13",
-  "description": "Minimal Debian bootc base image",
-  "release": "bookworm",
+  "description": "Minimal Debian Trixie bootc image (Debian 13+ required for OSTree support)",
+  "release": "trixie",
   "packages": {
     "required": [
       "linux-image-amd64",
       "systemd",
       "ostree",
-      "bootc",
-      "grub-pc",
-      "grub-efi-amd64",
-      "initramfs-tools",
-      "ca-certificates",
-      "curl",
-      "wget"
+      "bootc"
     ],
     "optional": [
-      "openssh-server",
       "vim",
-      "less",
-      "man-db"
+      "curl"
     ],
     "recommended": [
-      "debian-archive-keyring",
-      "locales"
-    ],
-    "build_deps": [
-      "build-essential",
-      "fakeroot",
-      "devscripts"
+      "ca-certificates"
     ]
   },
   "exclude": [
-    "snapd",
-    "flatpak",
-    "firefox",
-    "thunderbird"
+    "unattended-upgrades"
   ],
   "repositories": [
-    "deb http://deb.debian.org/debian bookworm main",
-    "deb http://deb.debian.org/debian bookworm-updates main",
-    "deb http://deb.debian.org/debian-security bookworm-security main"
+    {
+      "name": "debian",
+      "url": "http://deb.debian.org/debian",
+      "suite": "trixie",
+      "component": "main",
+      "arch": "amd64",
+      "enabled": true
+    }
   ],
-  "architecture": ["amd64", "arm64"],
+  "architecture": ["amd64"],
   "variants": [
     {
       "name": "minimal",
       "description": "Minimal base system",
+      "architectures": ["amd64"],
       "packages": {
         "required": [],
         "optional": [],
-        "recommended": [],
-        "build_deps": []
+        "recommended": []
       },
       "exclude": [],
-      "architecture": ["amd64", "arm64"],
-      "custom": false
-    },
-    {
-      "name": "server",
-      "description": "Server variant with additional packages",
-      "packages": {
-        "required": [
-          "openssh-server",
-          "nginx",
-          "postgresql-client"
-        ],
-        "optional": [],
-        "recommended": [],
-        "build_deps": []
-      },
-      "exclude": [],
-      "architecture": ["amd64", "arm64"],
-      "custom": false
+      "config": {}
     }
   ],
   "build": {
-    "system": "sbuild",
-    "environment": "debootstrap",
-    "dependencies": "aptitude",
-    "parallel": true,
-    "max_workers": 4
+    "type": "sbuild",
+    "environment": {},
+    "options": {}
   },
   "ostree": {
-    "mode": "bare",
-    "refs": [
-      "debian/13/amd64/minimal",
-      "debian/13/arm64/minimal"
-    ],
-    "repository": "/var/lib/deb-bootc-compose/ostree",
-    "signing": false,
-    "key_file": ""
+    "ref": "debian/13/amd64/minimal",
+    "subject": "Debian 13 Trixie minimal bootc image",
+    "body": "Minimal Debian Trixie bootc image for testing and development"
   },
   "output": {
-    "formats": ["container", "disk-image", "chunked-oci"],
-    "registry": "docker.io/debian",
-    "signing": false,
-    "compression": true
+    "formats": ["container", "disk"],
+    "container": {
+      "base_image": "debian:trixie-slim",
+      "labels": {
+        "org.debian.release": "13",
+        "org.debian.variant": "minimal"
+      },
+      "entrypoint": ["/usr/sbin/init"],
+      "cmd": []
+    },
+    "disk_image": {
+      "size": "10G",
+      "formats": ["raw", "qcow2"],
+      "bootloader": "grub",
+      "kernel": "linux-image-amd64",
+      "initramfs": true
+    }
+  },
+  "metadata": {
+    "maintainer": "debian-bootc-team@debian.org",
+    "homepage": "https://salsa.debian.org/debian-bootc-team/deb-bootc-compose"
   }
 }