feat(wyw_shaker): improve ModuleSource enum to handle broken resolutions

[layershifter]

Summary

Contains changes from #121. Needs to be rebased before merging.

• Updates ModuleSource to have original import in ::Resolved
• Updates ModuleSource to have ::ResolvedWithError, so errors could be handled.

Test plan

New tests added.

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Latest commit: 3cc3a6f

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