Verify public WinGet installs

[koko3tallah]

What changed

• add a Windows smoke workflow for the public WinGet package
• install OutageDeck.CLI from the official winget source
• verify the installed version
• verify the alerts command when the public package is version 0.1.3 or newer
• run the check daily, on demand, and whenever the workflow itself changes

Why

Microsoft's public source now contains OutageDeck.CLI version 0.1.2. This turns that catalog entry into a recurring end-user install check, so a broken package or missing command is caught after publication.

Manual runs can require an exact expected version when a new manifest propagates. The command check is version-aware because the public source can legitimately lag the latest GitHub release.

Validation

• official source2.msix extracted and queried successfully for OutageDeck.CLI 0.1.2
• first Windows run found version 0.1.2, verified the installer hash, extracted the archive, installed it, and added the outagedeck command alias
• workflow YAML parsed successfully
• actionlint passed
• git diff --check passed

The current pull request run is the clean public-install verification.