feat: Dilithium signatures

[czareko]

• Add Dilithium (ML-DSA-87, NIST FIPS 204) post-quantum signature support for access keys in NEAR
• Introduce ProtocolFeature::DilithiumSignatures enabled from protocol version 202
• core/crypto: Implement Dilithium public keys, secret keys, and signatures (qp-rusty-crystals-dilithium)
• core/primitives: Validate transactions with Dilithium keys based on protocol version
• runtime: Verify Dilithium signatures in the verifier
• rosetta-rpc: Support CurveType::Dilithium and SignatureType::Dilithium in models
• tools/mirror: Map Dilithium keys during migration
• integration-tests: Add create_runtime_node_with_dilithium() helper with protocol 202, and tests test_add_key_dilithium_runtime and test_transfer_signed_by_dilithium_runtime
• RuntimeUser: Add new_with_protocol_version() and pass protocol version from genesis so tests run with protocol 202
• No change to NIGHTLY_PROTOCOL_VERSION; Dilithium remains in the "not yet in Nightly" bucket (202); tests use explicit protocol_version = 202
• Run tests: cargo test --package integration-tests --features test_features -- dilithium --show-output

Commands for local run:
Init: cargo run --profile dev-release -p neard -- init
Start: cargo run --profile dev-release -p neard -- run