The schedule library is missing a get jobs(tag=None) function that allows users to retrieve job instances…

The schedule library is missing a get jobs(tag=None) function that allows users to retrieve job instances…: a task in repo2rlenv-swe-gen (Harbor dataset). Add a get jobs(tag=None) method to the Scheduler class and a corresponding module-level get jobs() function (following the same pattern used by…

The task

Add a `get_jobs(tag=None)` method to the `Scheduler` class and a corresponding module-level `get_jobs()` function (following the same pattern used by other module-level functions like `schedule.clear()`, `schedule.run_pending()`, etc.).

Part of FineEnvs/repo2rlenv-swe-gen.