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 new PHP client SDK generated via OpenAPI for the Lethean blockchain, including source code, models, API classes, documentation, tests, and configuration files. Updates Makefile to support PHP SDK generation and modifies php.json package configuration.
