Initial project setup with basic plugin structure

- Created plugin.toml with metadata
- Added main command script
- Implemented core functions
- Added basic tests
- Created README.md
- Set up project structure

docs/todo.md

@@ -1,7 +1,7 @@
 # Dokku Docker Compose Plugin - Implementation Plan
 
 ## Phase 1: Project Setup
-- [ ] Initialize Git repository
+- [x] Initialize Git repository
 - [ ] Set up project structure
 - [ ] Create basic plugin files
   - [ ] `plugin.toml` - Plugin metadata