Support additional dependency resolution inputs beyond requirements

ScanCode support most if not all Python package metadata formats. We should add support for these.
One design could be to include the parsing from SCTK directly here like we did for requirements. Alternative designs could be to accept an SCTK scan as an input or a list of Package URLs + vers or a list of "dependencies" as reported by SCTK .

- [ ] Support wheels and sdists as an input for dependency resolution
- [ ] Support setup.py/setup.cfg as an input for dependency resolution
- [ ] Support Pipfile and Pipfile.lock as an input for dependency resolution
- [ ] Support poetry pyproject.toml as an input for dependency resolution and its lock files