refactor: deprecate tool spec's arguments-only handler in favor of CallToolRequest (#375)

Tool handlers now receive CallToolRequest instead of raw arguments to
enable access to additional metadata parameters like progressToken

- Deprecate  handlers that take only Map<String, Object> arguments
- Introduce new  handlers that receive the full CallToolRequest object
- Maintain backward compatibility with deprecated call handlers
- Enhance API to provide access to complete tool request context beyond just arguments
- Add builder pattern for AsyncToolSpecification and SyncToolSpecification
- Add duplicate tool name validation during server building and runtime registration
- Update all test files to use new callTool handlers and builder pattern
- Add test coverage for new builder functionality and CallToolRequest handling

Signed-off-by: Christian Tzolov <christian.tzolov@broadcom.com>