fix: gui CI after closure lifetime merge

[GGRei]

Summary

This updates the v-gui CI after the closure lifetime/reclaim work landed in V.

The Windows job was still pinned to V 0.5.1, which does not include the new closure lifetime/reclaim API used by v-gui. This switches the Windows job to vlang/setup-v with the latest V compiler, matching the other CI jobs more closely.

It also refreshes the Windows dependency cache keys from the installed V version, so compiler updates do not keep reusing stale V/vglyph-related caches.

Changes

• Use vlang/setup-v@v1.4 for the Windows CI job.
• Log the installed V version instead of checking against a pinned old release.
• Key Windows vcpkg and vglyph caches from the installed V version.
• Format examples/showcase.v so the CI format check passes.

Notes

This PR does not change the closure lifetime/reclaim behavior itself.

macOS still depends on the separate vglyph fix, because the current failure there comes from compiling vglyph as a dependency with newer V checks.

Tests

v fmt -verify examples/showcase.v
git diff --check

[chatgpt-codex-connector]

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[GGRei]

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[chatgpt-codex-connector]

Codex Review: Didn't find any major issues. Breezy!

Reviewed commit: 17af549151

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