[beta10] Main Package should not be installed before dependent packages succeed

[JustinGrote]

Steps to Reproduce

1. Install-PSResource Az.Compute -Verbose
2. Press ctrl-c to simulate a failure after az.compute has been installed
3. Try importing az.compute, it will fail because dependent module Az.Accounts is not present

Recommended Resolution

Install dependent packages before installing the main package.

Further, why not just use Nuget's already very robust dependency handling and resolution rather than rolling a separate solution for PSGet? This article referenced from MS documentation explains some very good and high performance ways to go about that and I would have expected this module to basically ape this procedure:

https://martinbjorkstrom.com/posts/2018-09-19-revisiting-nuget-client-libraries

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[SydneyhSmith]

Thanks @JustinGrote we agree that this is worthwhile, although havent determined the amount of work required so havent scoped it to a particular preview release yet