Include cygwin1.dll in Windows SITL artifact

[sensei-hacker]

User description

Summary

Adds cygwin1.dll to the Windows SITL build artifact so users can run the SITL executable without having Cygwin installed.

Changes

• Add step to copy cygwin1.dll from /bin to build_SITL directory
• Update upload-artifact to include both *.exe and cygwin1.dll

Related

Cherry-picked from #11133 (CI change only, without the FLYSPARKF4 line-ending changes)

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PR Type

Enhancement

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Description

• Copies cygwin1.dll to Windows SITL build artifact

• Updates artifact upload to include DLL dependency

• Enables SITL executable to run without Cygwin installation

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Diagram Walkthrough

flowchart LR
  A["Build SITL"] --> B["Strip version numbers"]
  B --> C["Copy cygwin1.dll"]
  C --> D["Upload artifacts"]
  D --> E["*.exe + cygwin1.dll"]

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File Walkthrough

	Relevant files
Configuration changes	ci.yml Add cygwin1.dll to Windows SITL artifact                                  .github/workflows/ci.yml Added step to copy cygwin1.dll from /bin to build_SITL directory Updated artifact upload path to include both *.exe files and cygwin1.dll Enables Windows SITL executable to run without requiring Cygwin installation +5/-1

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