#114: Migrate to importlib

[abdullahQureshee]

Description: Resolves #114

JIRA: nil

Dependencies: nil

Merge deadline: nil

Installation instructions: nil

Testing instructions: nil

Reviewers:

• tag reviewer
• tag reviewer

Merge checklist:

• All reviewers approved
• CI build is green
• Version bumped
• Changelog record added
• Documentation updated (not only docstrings)
• Commits are squashed

Post merge:

• Create a tag
• Check new version is pushed to PyPi after tag-triggered build is
  finished.
• Delete working branch (if not needed anymore)

Author concerns: nil

[mariajgrimaldi]

I'm getting this error when using the latest version of the library: https://github.com/openedx/openedx-events/actions/runs/12516562993/job/34915860970#step:6:51. That was fixed by replacing importlib_resources with importlib.resources here which was the recommendation in the xblock-sdk migration PR. Should we replace importlib_resources with importlib.resources?