chore: remove macOS metadata file

[WH-2099]

Closes #338

Pull Request Checklist

Thank you for your contribution! Before submitting your PR, please make sure you have completed the following checks:

Compatibility Check

• I have checked whether this change affects the backward compatibility of the plugin declared in README.md
• I have checked whether this change affects the forward compatibility of the plugin declared in README.md
• This change does not introduce a breaking change.
• I have described the compatibility impact and the corresponding version number in the PR description
• I have checked whether the plugin version is updated in the README.md

Available Checks

• just build has passed
• Relevant documentation has been updated (if necessary)

Summary

• Remove the tracked .github/.DS_Store metadata file.

Compatibility

No SDK API, manifest, runtime, packaging, or plugin version impact. This only removes OS metadata from version control.

Validation

• git diff --cached --check passed before commit.
• just build passed.
• The commit hook just check was not used because it scans unrelated untracked external working directories in this checkout; the PR diff only deletes .github/.DS_Store.

[gemini-code-assist]

Note

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