Add entropy cmds and detail struct for value extraction

[wargio]

SQUASH ME

Your checklist for this pull request

• I've read the guidelines for contributing to this repository.
• I made sure to follow the project's coding style.
• I've documented every RZ_API function and struct this PR changes.
• I've added tests that prove my changes are effective (required for changes to RZ_API).
• I've updated the Rizin book with the relevant information (if needed).

Detailed description

• Implements entropy commands /ce and /cef as its own search collection.
• Adds RzSearchHitDetail struct to hold different types of info, such as bytes, string, signed integer, unsigned integer, double.
• Removes the comment field in favour of RzSearchHitDetail.
• SM4 keys are now extracted as flag comment when found.
• Magic search now shows the details and sets them as flag comment

[Rot127]

Just this one nitpick. Good call with moving the entropy in its own command btw. Search details are also way better than mine. Thanks!

[notxvilka]

Nice output enhancement!