feat: add reportLocalModule option

[wreulicke]

Summary

• Add the reportLocalModule configuration option.
• Skip errors returned from packages within the current Go module when set to false.
• Keep the current package behavior controlled by reportInternalErrors.
• Default reportLocalModule to true to preserve existing behavior.
• Add documentation and analysis test cases.

Testing

• go test ./... -count=1

Fixes #22

[wreulicke]

I am not sure whether to name it ignore Local Module.