Add serde_with dependency and implement multicall configuration in contract read logic

- Updated `Cargo.toml` to include `serde_with` version 3.14.0.
- Enhanced `contract_read.rs` to support multicall configuration with detailed execution strategies.
- Introduced `MulticallConfig` enum for flexible multicall handling, including enabling/disabling and custom addresses.
- Refactored contract reading logic to utilize multicall by default, with fallback to direct calls on failure.
- Improved error handling and response mapping for multicall results.

Author: d4mr

Cargo.lock

@@ -40,3 +40,4 @@ utoipa = { version = "5.4.0", features = [
 ] }
 utoipa-axum = "0.2.0"
 utoipa-scalar = { version = "0.3.0", features = ["axum"] }
+serde_with = "3.14.0"