Implement SHA3-256, SHA3-512, SHAKE128 and SHAKE256

[ctz]

No description provided.

[codspeed-hq]

Merging this PR will not alter performance

✅ 155 untouched benchmarks

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_{Comparing jbp-sha3 (18d2cae) with jbp-cpp-and-s2n-bignum (02bcb4a)}

[codecov]

Codecov Report

❌ Patch coverage is 99.44186% with 6 lines in your changes missing coverage. Please review.
✅ Project coverage is 99.76%. Comparing base (02bcb4a) to head (18d2cae).

Files with missing lines	Patch %	Lines
graviola/src/mid/sha3.rs	97.79%	6 Missing ⚠️

Additional details and impacted files

@@                    Coverage Diff                     @@
##           jbp-cpp-and-s2n-bignum     #173      +/-   ##
==========================================================
- Coverage                   99.77%   99.76%   -0.01%     
==========================================================
  Files                         184      187       +3     
  Lines                       51360    52435    +1075     
==========================================================
+ Hits                        51242    52311    +1069     
- Misses                        118      124       +6     

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[Copilot]

Pull request overview

Adds SHA-3 family hashing support to Graviola by introducing mid-level SHA3-256/SHA3-512 contexts and SHAKE128/SHAKE256 XOFs backed by Keccak-f1600 implementations in the low-level arch modules.

Changes:

• Introduce mid::sha3 with SHA3-256/SHA3-512 incremental hashing and SHAKE128/SHAKE256 incremental output APIs.
• Add Keccak-f1600 permutation implementations for x86_64 and aarch64, and wire them into low.
• Extend the asm parsing tooling and update README/module exports to surface SHA3 support.

Reviewed changes

Copilot reviewed 12 out of 12 changed files in this pull request and generated 2 comments.

Show a summary per file

File	Description
graviola/src/mid/sha3.rs	New SHA3/SHAKE sponge implementation + tests.
graviola/src/mid/mod.rs	Expose sha3 module in mid layer.
graviola/src/low/x86_64/sha3_keccak_f1600.rs	New generated Keccak-f1600 x86_64 asm wrapper.
graviola/src/low/x86_64/mod.rs	Register x86_64 Keccak-f1600 module.
graviola/src/low/mod.rs	Re-export sha3_keccak_f1600 for supported arches.
graviola/src/low/generic/blockwise.rs	Add Blockwise::add helper used by SHA3 padding.
graviola/src/low/aarch64/sha3_keccak_f1600.rs	New generated Keccak-f1600 aarch64 asm wrapper.
graviola/src/low/aarch64/mod.rs	Register aarch64 Keccak-f1600 module.
graviola/src/lib.rs	Re-export mid::sha3 under hashing.
admin/parse-asm/parse.py	Add new CFI macro expansions used by SHA3 asm parsing.
admin/parse-asm/driver.sha3.py	New driver to generate Rust asm wrappers for Keccak-f1600.
README.md	Mark SHA3/SHAKE as implemented.

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