Make release CLI packaging idempotent

[shps951023]

Summary

• stage the Windows CLI archive under RUNNER_TEMP instead of cached target/release-cli
• clear the staging directory before packaging
• allow the destination ZIP to be safely overwritten during release repair runs

The v0.5.0 repair run passed verification and Browser Lab packaging, then failed because Swatinem/rust-cache restored target/release-cli and New-Item rejected the existing directory: https://github.com/mini-software/MiniExcel-Rust/actions/runs/34975147809

After this merges, rerun the Release workflow with workflow_dispatch and tag=v0.5.0.

Validation

• ran the updated packaging commands twice consecutively
• verified the ZIP contains LICENSE, README.md, and miniexcel.exe
• actionlint .github/workflows/release.yml
• VS Code workflow diagnostics: no errors
• git diff --check

[coderabbitai]

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Reviewing files that changed from the base of the PR and between 8e3392e and 4d6b276.

📒 Files selected for processing (1)

• .github/workflows/release.yml

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_{Comment @coderabbitai help to get the list of available commands.}