chore: improve winget release process

[remyleone]

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Relates OR Closes #0000

Release note for CHANGELOG:

[Copilot]

Pull request overview

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Updates the GoReleaser Winget configuration to create PR-based releases against microsoft/winget-pkgs, using a Scaleway-owned fork and a versioned branch naming scheme.

Changes:

• Add Winget package_identifier and normalize SPDX license casing.
• Switch Winget repository owner to scaleway and configure PR creation targeting microsoft/winget-pkgs.
• Add a versioned branch template and a token sourced from WINGET_TOKEN.

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[codecov-commenter]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 50.41%. Comparing base (f33b0a4) to head (b52d42f).
⚠️ Report is 1 commits behind head on main.
✅ All tests successful. No failed tests found.

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #5742   +/-   ##
=======================================
  Coverage   50.41%   50.41%           
=======================================
  Files         342      342           
  Lines       78508    78508           
=======================================
  Hits        39583    39583           
  Misses      37429    37429           
  Partials     1496     1496           

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