🐛 Bound Windows process shutdown

[taras]

Motivation

Windows teardown currently waits for stdout and stderr EOF before checking whether it should run taskkill /T /F. When a process or descendant keeps an inherited output handle open, that wait never completes, the force-kill fallback is unreachable, and scope teardown hangs.

This is the Windows-specific follow-up to #228 and is intentionally separate from the Process.exited() API work in #230.

Approach

• Send Ctrl-C and close stdin as the graceful shutdown phase.
• Race close-settled process completion against a one-second grace period.
• Run taskkill /T /F when the grace period expires, then await final stdout and stderr closure.
• Add a Windows-only lifecycle regression whose parent and inherited-stdio descendant ignore Ctrl-C, requiring the process-tree fallback for Task.halt() to finish.
• Bump @effectionx/process from 0.8.1 to 0.8.2.

Validation

• pnpm check
• pnpm build
• pnpm lint
• pnpm fmt:check
• pnpm sync
• pnpm test:node (34 passed)
• pnpm test process (36 passed locally; Windows-only regression skipped on macOS)
• pnpm test (382 passed, 6 skipped)

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[pkg-pr-new]

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npm i https://pkg.pr.new/@effectionx/process@231

commit: f57c086