Winget-cli: Let WinGet search among issues/prs

[MilkFather]

Description of the new feature/enhancement

Add an option to search for information of a package in microsoft/winget-pkgs' issues and pull requests.

For contributors, a convenient search from winget's cli could lower the possibility of submitting duplicate manifests.

For users, a search in issues and pull requests could inform them about the status of the package (a new version is available and its install manifest is under review / the requested package is previously available but removed due to some reasons, etc)

Proposed technical implementation details (optional)

Add a flag to the search command to force search in issues/pull requests.

Automatically search in issues/pull requests if no match is found.

[megamorf]

I understand why this could be useful from a maintenance point of view but I don't really see the need for such a feature to be included in the winget cli. It could be solved by a PowerShell, Python or C# program that queries the GitHub API and aggregates the results locally so that one doesn't reach the API query limit.

[denelon]

This might make sense for the community repository, but I'm not sure about third-party repositories. It is also possible someone might build a "Tool" for the winget-pkgs repository to search PRs.