tensor-grep: add build-tensor-grep.yml for riscv64 wheels

[luhenry]

• Package: tensor-grep
• Version: 1.118.0
• Source: https://github.com/oimiragieo/tensor-grep
• Docs: https://pypi.org/project/tensor-grep/

Compiles the pyo3/maturin Rust core (ast-grep-core/ripgrep-crate-based regex and AST search) behind the tg CLI. Upstream publishes no riscv64 wheel.

Mirrors upstream's ci.yml build-wheels-pypi job.

Differs from upstream

• Builds via PyO3/maturin-action targeting riscv64gc-unknown-linux-gnu in the manylinux_2_39 image - upstream builds on bare ubuntu-latest/windows-latest/macos-latest.

Matrix: no 3.14t - the wheel is cp311-abi3 and pyo3 disables abi3 under free-threading; upstream ships no free-threaded wheel either.

Testing

• rg-compatible search example (grep-for-pattern, case-insensitive) - upstream ships no wheel-level test suite in the sdist/checkout.
• cryptography (a required runtime dependency) resolves from pypi.riseproject.dev; no riscv64 wheel on public PyPI.

License: OK - Apache-2.0, LICENSE/NOTICE bundled via [tool.maturin] include.

Built on cp312/cp313/cp314.