Auditree-framework

- [ADDED] Repository pull request metadata retrieval added to Github service utility.

- [ADDED] Returned support for `DerivedEvidence`.
- [ADDED] Returned support for `TmpEvidence`.

- [FIXED] Evidence cache loading bug resolved.

- [ADDED] Pre-commit hook for running `bandit` as part of CI/CD was added.
- [CHANGED] Replaced the deprecated `imp` library with `importlib`.
- [CHANGED] Replaced the deprecated `ibm_security_advisor_findings_api_sdk` library with `ibm_cloud_security_advisor`.
- [FIXED] Added clarifying PagerDuty notifier documentation content.
- [FIXED] Addressed `bandit` (minor) security issue findings.

- [CHANGED] Now using `pathlib` exclusively for operating system filepath and file functionality.
- [FIXED] README table of contents generation multi-blank line bug is resolved.

- [ADDED] Locker get_large_files method added to return large files in the locker.
- [ADDED] Logging of large files added to remote push operation.