ci: add Winget Releaser workflow

[sitiom]

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

wgcf has been added to Winget (https://github.com/microsoft/winget-pkgs/tree/master/manifests/v/ViRb3/wgcf), and this workflow will be used to update it.

Before merging this:

1. Ensure that the API_GITHUB_TOKEN secret has at least the public_repo scope:

2. Fork https://github.com/microsoft/winget-pkgs under @ViRb3. 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.

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]

@ViRb3 bump