RzSearch refactor

[Rot127]

WIP

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 or updated the documentation of every function and struct this PR changes. If not so I've explained why.
• I've added tests that prove my fix is effective or that my feature works (if possible)
• I've updated the rizin book with the relevant information (if needed)

Detailed description

Companion PR: rizinorg/rizin-testbins#162

What happens here:
Slowly copying changes from https://github.com/Rot127/rizin/tree/rz-search-reference (which is #4742 with some comments already addressed).

Will resend to fuzz-dist when all the tests pass here.

Stuff to do (without any order)

• Move essential changes from https://github.com/Rot127/rizin/tree/rz-search-reference / Add / (search) commands to newshell + rewrite of rz_search #4742 before starting with commands
• Fix commands
  • Bytes search
    • Implement
    • Fix suggestions
    • Use RzBuffer
    • Document usage in book (normal, wildcards, different maps, searching with debug + don't forget to run until mapped, API).
  • String search
    • Implement
    • Fix suggestions
      • Encoding names in command arguments.
    • Name hits based on encoding.
    • Testing
      • Case insensitivity on non latin alphabets.
      • Encoding + endianess
        • RZ_STRING_ENC_IBM290
        • RZ_STRING_ENC_EBCDIC_UK
        • RZ_STRING_ENC_EBCDIC_US
        • RZ_STRING_ENC_EBCDIC_ES
        • Fix: Offset into memory, not into the utf8 string.
      • diacritics
      • Search for strings less then 4 bytes.
      • Search within buffers which have no \0 in it (non-C strings).
      • Regex search
    • Document in book (basic usage, API, usage of distance, behavior of edge cases of distance: utf8 and other encodings, diacritics), case (in)sensitive.
• Update book (with example API implementation).
• Implement general search IO API which doesn't require knowledge of search spaces (what rz_search_run() was before).
• Show progress of search.
• Use RzBuffer for byte space searches
• search.align shoudl default to search.alignment=asm.cpu_bits/8.
• (Optional) Allow to cancel search with ctrl + c
• (Optional) Extend RzSearchHit to hold more complex data.
• (Optional) Add option to define search/divide strategy.
• (Optional) Dispatch views into IO as chunks to the find() callback.

Test plan

...

Closing issues

closes #1586