ci: add windows arm64 and linux riscv64 release targets

[sou1118]

Summary

Add two release build targets:

• aarch64-pc-windows-msvc — built natively on the windows-11-arm runner (free for public repositories)
• riscv64gc-unknown-linux-gnu — cross-compiled with cross, same as the existing aarch64-linux target

Feasibility checks

• mise ships windows-arm64 binaries, so jdx/mise-action works on the ARM runner.
• cross provides a riscv64gc-unknown-linux-gnu image (docker/Dockerfile.riscv64gc-unknown-linux-gnu).
• cargo check --target riscv64gc-unknown-linux-gnu passes locally — all dependencies are pure Rust.
• actionlint passes.

Note: this workflow only runs on tag pushes, so the new targets get their first real run on the next release. If you want to verify earlier, trigger a workflow_dispatch run from this branch — the build jobs are what matter; the release/publish jobs will fail without a new tag/version, which is expected.

Summary by CodeRabbit

• New Features
  • Added release builds for AArch64 Windows and RISC-V 64-bit Linux platforms.

[coderabbitai]

No actionable comments were generated in the recent review. 🎉

ℹ️ Recent review info

⚙️ Run configuration

Configuration used: defaults

Review profile: CHILL

Plan: Pro Plus

Run ID: 60b10f68-f33c-4470-be02-18cc89ae3e4f

📥 Commits

Reviewing files that changed from the base of the PR and between 31c2d4e and 46c9bde.

📒 Files selected for processing (1)

• .github/workflows/release.yml

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📝 Walkthrough

Walkthrough

The release workflow now builds AArch64 Windows MSVC artifacts on an ARM Windows runner and RISC-V 64-bit Linux artifacts through cross-compilation.

Changes

Release target matrix

Layer / File(s)	Summary
Additional release build targets .github/workflows/release.yml	The release matrix adds AArch64 Windows MSVC and RISC-V 64-bit Linux targets with native and cross-compilation settings.

Estimated code review effort: 1 (Trivial) | ~5 minutes

🚥 Pre-merge checks | ✅ 5

✅ Passed checks (5 passed)

Check name	Status	Explanation
Description Check	✅ Passed	Check skipped - CodeRabbit’s high-level summary is enabled.
Title check	✅ Passed	The title clearly summarizes the addition of Windows ARM64 and Linux RISC-V release targets to CI.
Docstring Coverage	✅ Passed	No functions found in the changed files to evaluate docstring coverage. Skipping docstring coverage check.
Linked Issues check	✅ Passed	Check skipped because no linked issues were found for this pull request.
Out of Scope Changes check	✅ Passed	Check skipped because no linked issues were found for this pull request.

✨ Finishing Touches

🧪 Generate unit tests (beta)

• Create PR with unit tests
• Commit unit tests in branch ci/add-release-targets

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