Add Winget Releaser workflow

[sitiom]

• Resolves https://github.com/superfly/flyctl/issues/1625

This action automatically generates manifests for Winget Community Repository (microsoft/winget-pkgs) and submits them.

Before merging this:

1. Ensure GORELEASER_GITHUB_TOKEN has the public_repo scope.

2. Fork https://github.com/microsoft/winget-pkgs under @superfly. The action will use that fork for making a branch and creating a PR with the upstream winget-pkgs repository on every release.
3. Install Pull on the winget-pkgs fork to ensure that it is constantly updated.

You can test out the action inputs in this playground.

If you want to see an example of a PR created using this action, see microsoft/winget-pkgs/pulls (Pull request has been created with WinGet Releaser).

[sitiom]

Bump @ndarilek

[ndarilek]

Sorry, there's a bit of internal discussion about whether we can take this on. We'll get back to you soon.

Thanks for getting this done!