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

config.yaml

@@ -0,0 +1,28 @@
+# Orchard Server Configuration
+# This file can be overridden by environment variables prefixed with ORCHARD_
+
+server:
+  host: "0.0.0.0"
+  port: 8080
+
+database:
+  host: "localhost"
+  port: 5432
+  user: "orchard"
+  password: "orchard_secret"
+  dbname: "orchard"
+  sslmode: "disable"
+
+s3:
+  endpoint: "http://localhost:9000"
+  region: "us-east-1"
+  bucket: "orchard-artifacts"
+  access_key_id: "minioadmin"
+  secret_access_key: "minioadmin"
+  use_path_style: true
+
+redis:
+  host: "localhost"
+  port: 6379
+  password: ""
+  db: 0