apiviewgo assumes root package name matches module name

https://github.com/Azure/azure-sdk-tools/blob/9a09542c3b53d0ed6d1f307f41905242c05cd861/src/go/cmd/pkg.go#L63-L64

This is true for most, if not all, SDK modules, however it isn't always true in general. The root package of a module may have any name. When the package name doesn't match the module name, `Module` stores the parsed `Pkg` with the wrong key, making the package's types unfindable during alias resolution:
https://github.com/Azure/azure-sdk-tools/blob/9a09542c3b53d0ed6d1f307f41905242c05cd861/src/go/cmd/module.go#L97
(`p.Name() == Pkg.relName`)

Read src/go/cmd/pkg.go at lines 63-64 and src/go/cmd/module.go at line 97. Trace how the root package is parsed and stored, then verify alias resolution when the package name differs from the module name. Done means the package's types remain findable under that valid naming difference.

Written by the indexing model from the issue text.