Support Recursive Calls to Bash Scripts within Jenkinsfiles #978

We aim to add support for recursive calls to bash scripts within Jenkinsfile configuration, similar to what is already supported for GitHub Actions. The implementation should be straightforward, but before proceeding, we should first refactor the bashparser module to completely decouple it from GitHub Actions-specific implementations. This will make the parser more general and flexible for future integrations with other CI systems like Jenkins.