Submitting should check to see if there is already an open PR.

Description of the new feature/enhancement

When a user tries to submit to the community repo, wingetcreate should use GitHub's Issue/PR search to see if there is already an open PR for that version, and if so, warn the user (with a link to the PR?).

Proposed technical implementation details (optional)

If you put in:path <path to folder or file> in GitHub's PR search, it will only show you PRs that are modifying files in a certain directory. For example, is:pr in:path manifests/m/Microsoft/Edge/94.0.992.38 gets me my PR from earlier today which adds version 94.0.992.38 of Microsoft Edge. This is also available via the API.

This could be used to stop duplicates of updates, since wingetcreate could check and see if someone already got to it first. Of course, a --force option should be present if someone really wants to try to open the PR anyway (perhaps they have some hot new metadata they want to add) but most of the time, we just get two of the same thing.

Start at wingetcreate's community-repository submission flow and review the GitHub Issues/PR search API documentation linked in the issue. Implement a check for an open PR matching the package version, warn with a link when found, and preserve a --force path for intentional duplicates.