[Slice] Occurrences slices

Sometimes, computing and categorizing all four styles of usages is computationally intensive. We need a simpler and quicker slicing technique that uses the chen SBOM-based auto-tagger to list only the occurrences, which is file location with line number.

This might be challenging for c/c++ since the usages slices are mandatory for creating an SBOM. So we might need to port parsedeps slicing to c/c++ to remove this dependency.