ML-DSA sign verify command

[stenslae]

ISSUE 189 FIX: Added an alias so both ml-dsa and dilithium subcommands can be used.

[wolfSSL-Fenrir-bot]

Fenrir Automated Review — PR #245

Scan targets checked: wolfclu-bugs, wolfclu-src

No new issues found in the changed files. ✅

[Copilot]

Pull request overview

This PR adds an ml-dsa alias for the existing Dilithium sign/verify path in wolfCLU, and also extends the rand command implementation and regression test coverage (not mentioned in the PR description).

Changes:

• Add ml-dsa as an alias for dilithium across mode selection, sign/verify setup, and help output.
• Refactor rand argument parsing to robustly recover the positional byte-count, reject duplicate/unknown flags, defer -out file creation until after validation, and generate large outputs in chunks.
• Expand Python test coverage for rand parsing edge cases and for ml-dsa alias behavior in gen/sign/verify flows.

Reviewed changes

Copilot reviewed 6 out of 6 changed files in this pull request and generated 3 comments.

Show a summary per file

File	Description
tests/rand/rand-test.py	Adds extensive regression coverage for rand parsing, duplicate flags, size overflow guards, and large-output behavior.
tests/genkey_sign_ver/genkey-sign-ver-test.py	Adds tests validating ml-dsa as an alias and cross-compatibility with dilithium.
src/tools/clu_rand.c	Implements stricter positional parsing/validation, duplicate detection, deferred -out opening, and chunked RNG generation.
src/tools/clu_funcs.c	Updates help output to advertise ml-dsa and dilithium aliasing; adds ML-DSA help text.
src/sign-verify/clu_sign_verify_setup.c	Recognizes ml-dsa as selecting the Dilithium sign/verify path; updates a user-facing error string.
src/clu_main.c	Registers ml-dsa as a top-level mode mapped to the Dilithium handler.

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