* feat(server): add bidirectional client communication support
* fix(server): use correct session ID string conversion method
* fix: clean up docblocks for request handler methods in Builder
* fix: merge artifacts
* refactor: reorganize server handlers and transport structure
* feat: move the test files to corresponding directories
* fix: linter issues
* fix: correct PHPDoc formatting and streamline handler imports
* refactor: update import statement for ServerBuilder to Builder