False negative install

[denelon]

Description of the new feature/enhancement

I've seen a couple of Apps install, but I've gotten error messages that made me think the install failed. Once with PowerShell (going fro 7.0.0 -> 7.0.1), and once validating a manifest that includes winget (same version) :) We should figure out a way to see if we can resolve this. I'm expecting this to primarily be related to updating the shell winget is executed in, or winget itself.

Note: there is another issue to deal with non zero return codes.

Proposed technical implementation details (optional)

Maybe we can use delayed registration for installers (MSIX support this) or another technique. If we detect one of these, it would be nice to inform the user, and set the proper expectation about the behavior and what choices they may have regarding that install.

[denelon]

Support non-zero exit codes is the other issue mentioned above.

• Support non-zero exit codes as success #137

[denelon]

I believe this has been resolved in 1.7.