Make python-fx an optional dependency

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I use qiling in a python project to emulate binaries. It's an awesome project thanks a lot !

Nevertheless each time I build it, it imports loads of dependencies that I don't need and don't use, especially python-fx, that imports pillow, which

• crouds my github security advisory with vulnerabilities in pillow,
• limits the python versions my project can build for.

Describe the solution you'd like
Send us a pull request always help, or any pseudo code might be useful.

At the moment I do a manual override to say that I don't need python-fx in my pyproject.toml, but I would really like it if qiling could implement blocks of optionnal dependencies groups (such as this other RE project angr does :
https://github.com/angr/angr/blob/9af373689f450717ec0d0b8be0daed2477a091ee/pyproject.toml#L81-L99

So as people using qiling as a dependency can only import the core of a qiling in their projects.

Thanks a lot

Start by inspecting the dependency declarations in pyproject.toml, then compare their optional-dependency groups with the angr example linked in the issue. Verify that a core qiling installation no longer pulls in python-fx while users can still opt into the related dependency group.