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>

docs/vendor/monsterui/api_ref/docs_html.md

@@ -0,0 +1,15 @@
+# HTML Styling API Reference
+
+See Source
+
+See Output
+
+<div><h1 class="uk-h1 text-4xl font-bold mt-12 mb-6">Hello, World!</h1><p class="text-lg leading-relaxed mb-6">This is a paragraph</p></div>
+
+[code]
+
+    def ex_applyclasses():
+        return apply_classes('<h1>Hello, World!</h1><p>This is a paragraph</p>')
+    
+[/code]
+