Improve install flow when a source fails

[denelon]

Relevant area(s)

WinGet CLI

Description of the new feature / enhancement

If I have a priority order on WinGet sources and a single best result is found in one of the top sources, but a lower source encounters a failure, install the matching best result.

Examples:
I have source "A" first and source "B" second.

• If a single best match is found in source A, and source B fails, install the best match from source A.
• If source A fails and a best match is found in source "B" prompt the user as implemented in the feature referenced below.

Discovered during:

• winget install requires --source even when only one result exists from working sources #6164

Comment on PR:

• Don't require --source when partial source failure leaves a single result #6165 (comment)

Proposed technical implementation details

No response

[github-actions]

The following issues might be duplicates:

• winget install requires --source even when only one result exists from working sources #6164

AI-generated content by genai-issue-dedup may be incorrect.

[Karl-WE]

Demitrius Nelon (@denelon) I would propose tagging this as breaking change for this to qualify for version 2.0.
Eventually this allows changing the default behaviour as requested in the original discussion #6164.