Move initialization of all crypto search methods to the add() function.

[Rot127]

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

Adding search methods in the initialization function would delude the consistency of the design.
Meaning: After initialization of the any collection, it is expected to be empty. Search methods have to be added in a separated step.

Test plan

All green

Closing issues

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