New package: OEClassic.OEClassic version 5.4.0

[Dragon1573]

Checklist for Pull Requests

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• Is there a linked Issue? If so, fill in the Issue number below.
  • Resolves [Package Request]: OEClassic.OEClassic #358420

Manifests

• Have you checked that there aren't other open pull requests for the same manifest update/change?
• This PR only modifies one (1) manifest
• Have you validated your manifest locally with winget validate --manifest <path>?
• Have you tested your manifest locally with winget install --manifest <path>?
  • Related [Sandbox Test]: WinGet failed to download installer file with proper name winget-cli#6121
  • Related Installer downloaded successfully and exists on disk, but installation phase fails/silently exits winget-cli#6126
  • Waiting Improve MOTW error handling in download flow winget-cli#6127
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Manual validation

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Microsoft Reviewers: Open in CodeFlow

[wingetbot]

Validation Pipeline Run WinGetSvc-Validation-138-358546-20260412-1

[stephengillie]

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