[New Feature]: Validate against similar top-level and overall identifiers

[Trenly]

Description of the new feature/enhancement

When the pipelines run Manifest Validation, they should provide a recommendation if there is another package identifier which is similar but not the same for the first part of the package identifier and the overall package identifier

Proposed technical implementation details (optional)

• PR for TestPublisherInc.ExamplePackageA

Your manifest appears to be under TestPublisherInc. There are similar folders which already exist. Please check if any of these may be duplicate top-level identifiers and update your PR accordingly.

• TestPublisher

• PR for TestPublisherInc.ExamplePackageA

• Your submission appears to be for TestPublisherInc.ExamplePackageA. There are similar packages which already exist. Please check if any of these may be duplicates and update your PR accordingly.

• TestPublisher.ExamplePackage
• TestPublisher.Example.PackageA
• TestPublisher.ExampleOtherPackage