Renamed Go SDK API services and documentation from BlockAPI/InfoAPI to BlockUtilsSdkClientGo/InfoUtilsSdkClientGo for consistency. Updated all references, method receivers, and usage examples accordingly. Added new Java SDK client, models, API, documentation, and build files under utils/sdk/client/java. Updated Go module dependencies and added go.sum. Enhanced Go models to support additional properties in JSON unmarshalling.
Introduces a generated Go SDK client for the Lethean Blockchain API, including OpenAPI spec, models, API interfaces, documentation, and tests. This enables Go applications to interact with Lethean blockchain endpoints for block, info, and transaction operations.
