feat(python): add packaging detector and respective hook (#1223)

Co-authored-by: knqyf263 <knqyf263@gmail.com>

pkg/detector/library/detect.go

@@ -32,6 +32,7 @@ func detect(driver Driver, libs []ftypes.LibraryInfo) ([]types.DetectedVulnerabi
 
 		for i := range vulns {
 			vulns[i].Layer = lib.Layer
+			vulns[i].PkgPath = lib.FilePath
 		}
 		vulnerabilities = append(vulnerabilities, vulns...)
 	}