Apply rustfmt to test vectors and use static slices instead of vec

[nuttycom]

Fixes #66

[Copilot]

Pull request overview

Updates the Rust test-vector generation/CI pipeline to enforce consistent formatting and shifts generated Rust test-vector types from heap-allocated Vec to 'static slice references.

Changes:

• Switches several generator schemas from Vec<...> / Option<Vec<...>> to &'static [...] / Option<&'static [...].
• Updates the Rust emission logic to print slice literals (&[...]) and adds a slice-based bool emitter.
• Runs rustfmt during Rust test-vector regeneration and adds Rust toolchain setup + a compile check in CI.

Reviewed changes

Copilot reviewed 34 out of 44 changed files in this pull request and generated 3 comments.

Show a summary per file

File	Description
zcash_test_vectors/zip_0244.py	Updates Rust field types to 'static slices for ZIP-0244 vectors.
zcash_test_vectors/zip_0243.py	Updates Rust field types to 'static slices for ZIP-0243 vectors.
zcash_test_vectors/zip_0233.py	Updates Rust field types to 'static slices for ZIP-0233 vectors.
zcash_test_vectors/zip_0143.py	Updates Rust field types to 'static slices for ZIP-0143 vectors.
zcash_test_vectors/unified_incoming_viewing_keys.py	Converts bytes fields to Option<&'static [u8]> / &'static [u8].
zcash_test_vectors/unified_full_viewing_keys.py	Converts bytes fields to Option<&'static [u8]> / &'static [u8].
zcash_test_vectors/unified_address.py	Converts bytes fields to Option<&'static [u8]> / &'static [u8].
zcash_test_vectors/output.py	Adjusts Rust emission to prefer slice literals and slice-bool formatting.
zcash_test_vectors/orchard/sinsemilla.py	Converts domain/msg types to slice-based Rust types (&[u8], &[bool]).
zcash_test_vectors/orchard/group_hash.py	Converts domain/msg Rust types to &'static [u8].
zcash_test_vectors/f4jumble.py	Converts Rust types to &'static [u8].
test-vectors/rust/zip_0320.rs	Rustfmt reflow of hard-coded test vectors.
test-vectors/rust/zip_0316.rs	Rustfmt reflow of hard-coded test vectors.
test-vectors/rust/zip_0032_registered.rs	Rustfmt reflow of hard-coded test vectors (incl. &[] cleanup).
test-vectors/rust/zip_0032_arbitrary.rs	Rustfmt reflow of hard-coded test vectors (incl. &[] cleanup).
test-vectors/rust/sapling_generators.rs	Rustfmt reflow of hard-coded test vectors.
test-vectors/rust/orchard_zip32.rs	Rustfmt reflow of hard-coded test vectors.
test-vectors/rust/orchard_poseidon_hash.rs	Rustfmt reflow of hard-coded test vectors.
test-vectors/rust/orchard_map_to_curve.rs	Rustfmt reflow of hard-coded test vectors.
test-vectors/rust/orchard_generators.rs	Rustfmt reflow of hard-coded test vectors.
test-vectors/rust/orchard_empty_roots.rs	Rustfmt reflow of hard-coded test vectors (multi-line array formatting).
test-vectors/rust/f4jumble_long.rs	Rustfmt reflow of hard-coded test vectors.
regenerate.sh	Pipes Rust generation through rustfmt when producing .rs vectors.
.github/workflows/test_vectors.yml	Installs rustfmt in the Rust matrix job and compiles generated Rust vector files.

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[nullcopy]

utACK f0cfe15