[cli] container image-based generator

[prabhu]

The upcoming version of depscan v6 introduces the concept of BOM engines, with CdxgenImageBasedGenerator being one of them.

https://github.com/owasp-dep-scan/dep-scan/blob/117d85be50c7df4c5059a5eddc284f7e918b69a2/packages/xbom-lib/src/xbom_lib/cdxgen.py#L250

It would be great to port this feature to cdxgen v12 and enhance the current CLI to first detect project types, then generate BOMs using the appropriate container images before performing aggregation. This would improve the precision a bit at the cost of increased gen time (which is fine).