Refactor job client into separate crate

- Moved client code from rust/src/client.rs to rust/client/ subdirectory
- Created separate hero-job-client crate for better modularity
- Updated Cargo.toml to include client as workspace member
- Client can now be used independently of the main hero-job crate

rust/Cargo.toml

@@ -10,13 +10,15 @@ serde = { version = "1.0", features = ["derive"] }
 serde_json = "1.0"
 uuid = { version = "1.0", features = ["v4"] }
 thiserror = "1.0"
-redis = { version = "0.25", features = ["aio", "tokio-comp"] }
-tokio = { version = "1.0", features = ["rt", "time"] }
 log = "0.4"
 secp256k1 = { version = "0.28", features = ["recovery"] }
 sha2 = "0.10"
 hex = "0.4"
 
+[target.'cfg(target_arch = "wasm32")'.dependencies]
+wasm-bindgen = "0.2"
+serde-wasm-bindgen = "0.6"
+
 [lib]
 name = "hero_job"
 path = "src/lib.rs"