fix(ci): package release runtimes before smoke tests

[pakitovic]

Summary

• smoke-test the Windows executable from the packaged directory after copying runtime DLLs
• allow Linux and macOS source-build releases to package either static SDL3 output or emitted shared libraries
• update desktop release docs to describe the packaged-layout smoke-test invariant

Root cause

The v0.1.0 release workflows assumed one SDL3 runtime shape on every platform. Windows ran gb-desktop.exe --help before runtime DLLs were copied into the package directory, while Linux and macOS failed when no libSDL3 shared object was emitted by the SDL3 source-build path.

Validation

• ruby YAML parse for release Linux/macOS/Windows workflows
• git diff --check HEAD~1 HEAD
• repository pre-push hook: cargo fmt-check, cargo lint, typos, cargo deny-check, make coverage-check

[chatgpt-codex-connector]

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