Initial commit: Orchard content-addressable storage system

- Go server with Gin framework
- PostgreSQL for metadata storage
- MinIO/S3 for artifact storage with SHA256 content addressing
- REST API for grove/tree/fruit operations
- Web UI for managing artifacts
- Docker Compose setup for local development

.gitignore

@@ -0,0 +1,50 @@
+# Binaries
+/bin/
+*.exe
+*.exe~
+*.dll
+*.so
+*.dylib
+
+# Test binary
+*.test
+
+# Output of go coverage tool
+*.out
+
+# Go workspace file
+go.work
+
+# IDE
+.idea/
+.vscode/
+*.swp
+*.swo
+*~
+
+# OS
+.DS_Store
+Thumbs.db
+
+# Build
+/build/
+/dist/
+
+# Local config overrides
+config.local.yaml
+
+# Environment files
+.env
+.env.local
+.env.*.local
+
+# Logs
+*.log
+logs/
+
+# Local Orchard cache
+.orchard/
+
+# Temp files
+tmp/
+temp/