Support `--filter`s with `<` and `>`

[jedevc]

To be able to things like --filter size>50mb.

The filters code all lives in https://github.com/unikraft-cloud/x/tree/prod-staging/filters.

[Omkar-Ugal]

Hey @jedevc, I'm interested in working on this issue.

[jedevc]

Yup absolutely! Do take a look at it - it'll probably need some upstream changes in x.

[Omkar-Ugal]

Thanks @jedevc! I'll work on it.