Start CQRS refactoring: Create Osiris client crate

- Added workspace structure to Osiris Cargo.toml
- Created osiris-client crate for query operations (GET requests)
- Implemented generic get(), list(), query() methods
- Added KYC, payment, and communication query modules
- Created comprehensive refactoring plan document

CQRS Pattern:
- Commands (writes) → Supervisor client → Rhai scripts
- Queries (reads) → Osiris client → REST API

Next steps:
- Implement Osiris server with Axum
- Restructure SDK client by category (kyc/, payment/, etc.)
- Update FreezoneClient to use both supervisor and osiris clients

server/Cargo.toml

@@ -0,0 +1,16 @@
+[package]
+name = "osiris-server"
+version = "0.1.0"
+edition = "2021"
+
+[dependencies]
+osiris = { path = ".." }
+axum = "0.7"
+tokio = { version = "1.23", features = ["full"] }
+serde = { version = "1.0", features = ["derive"] }
+serde_json = "1.0"
+tower = "0.4"
+tower-http = { version = "0.5", features = ["cors", "trace"] }
+tracing = "0.1"
+tracing-subscriber = { version = "0.3", features = ["env-filter"] }
+anyhow = "1.0"