feat: initial project setup with implementation plan

- Add PLAN.md with 40-step checklist across 10 phases
- Add CLAUDE.md with project-specific instructions
- Set up nix flake with FastHTML/MonsterUI dependencies
- Create Python package skeleton (src/animaltrack)
- Vendor FastHTML and MonsterUI documentation
- Add Docker build configuration

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

src/animaltrack/__init__.py

@@ -0,0 +1,4 @@
+# ABOUTME: AnimalTrack - Event-sourced animal tracking for poultry farm management.
+# ABOUTME: Main package initialization.
+
+__version__ = "0.1.0"

src/animaltrack/cli.py

@@ -0,0 +1,61 @@
+# ABOUTME: Command-line interface for AnimalTrack.
+# ABOUTME: Provides migrate, seed, and serve commands.
+
+import argparse
+import sys
+
+
+def main():
+    """Main entry point for the AnimalTrack CLI."""
+    parser = argparse.ArgumentParser(
+        prog="animaltrack",
+        description="AnimalTrack - Event-sourced animal tracking for poultry farm management",
+    )
+    subparsers = parser.add_subparsers(dest="command", help="Available commands")
+
+    # migrate command
+    migrate_parser = subparsers.add_parser("migrate", help="Run database migrations")
+    migrate_parser.add_argument(
+        "--to", type=str, help="Migrate to specific version", default=None
+    )
+
+    # create-migration command
+    create_parser = subparsers.add_parser(
+        "create-migration", help="Create a new migration file"
+    )
+    create_parser.add_argument("description", help="Description for the migration")
+
+    # seed command
+    subparsers.add_parser("seed", help="Load seed data")
+
+    # serve command
+    serve_parser = subparsers.add_parser("serve", help="Start the web server")
+    serve_parser.add_argument("--port", type=int, default=5000, help="Port to listen on")
+    serve_parser.add_argument("--host", type=str, default="0.0.0.0", help="Host to bind to")
+
+    args = parser.parse_args()
+
+    if args.command is None:
+        parser.print_help()
+        sys.exit(1)
+
+    if args.command == "migrate":
+        print(f"Running migrations (to={args.to})...")
+        # TODO: Implement migration runner
+        print("Migration not yet implemented")
+    elif args.command == "create-migration":
+        print(f"Creating migration: {args.description}")
+        # TODO: Implement migration creation
+        print("Migration creation not yet implemented")
+    elif args.command == "seed":
+        print("Loading seed data...")
+        # TODO: Implement seeder
+        print("Seeding not yet implemented")
+    elif args.command == "serve":
+        print(f"Starting server on {args.host}:{args.port}...")
+        # TODO: Implement server
+        print("Server not yet implemented")
+
+
+if __name__ == "__main__":
+    main()