Organize prime and dice code into dedicated suite

[dlworrell]

Summary

• collect the prime generators and prime-seeded dice implementations under prime-number-suite/
• retain the existing .github/, docs/, election-data/, election_reporting/, reports/, and tests/ directory structure
• leave README.md as the only loose tracked file at the repository root
• update repository and engineering documentation for the new paths and the election-reporting codebase that shares the repository
• document maintained versus legacy implementations and add review-oriented comments throughout the moved code
• add strict-warning builds, integration tests, sanitizer coverage, and a dedicated GitHub Actions workflow

Notable correctness and review changes

• harden and document the C11 segmented wheel sieve
• convert the CUDA implementation to a conventional .cu target and correct inclusive upper-bound handling
• prevent wrapped prime lists from replaying identical dice RNG states by mixing each logical roll index into its seed
• repair maintained PhysX task sharding and local RNG plumbing
• clearly quarantine incomplete historical PhysX prototypes under dice/legacy/
• keep strict AEMS governance active after relocating .clang-tidy, with current review dispositions for the sieve's centralized allocation boundaries

Verification

• strict C11/C++17 builds with -Wall -Wextra -Wpedantic -Wconversion -Wshadow -Werror
• 8/8 prime/dice integration tests pass
• ASan/UBSan build and tests pass locally
• 250 randomized prime ranges match an independent reference implementation
• π(1,000,000) = 78,498 and final prime 999,983 verified
• 11/11 existing election-reporting tests pass with the repository's pinned EDT revision
• Python syntax, workflow YAML, Markdown links, whitespace, and banned-API scans pass
• GitHub Actions pass: Prime Number Suite, Election Result Reports, and AES-SEC-001 Governance

Review notes

CUDA compilation requires an NVIDIA CUDA toolchain and representative hardware. The maintained PhysX target requires a complete PhysX SDK. Both remain optional CMake targets and are documented for environment-specific review.