* Atheris fuzz initial commit

* Fix pylint

* Update payload alphabet to exclude backtick and dollar characters

* Refactor fuzzing commands and update Dockerfile for dependency installation

* Refactor GitHub Actions workflow to separate testing and linting steps, update dependencies installation, and improve readability

* Separate GA workflows for fuzzing, linting, and SSH end-to-end testing in different files

* Merge all tests into a single file