For Nx plugins that use the the new TS solution setup, we need to
account for `generators.json`, `executors.json`, and `migrations.json`
pointing to `dist` rather than source.
This PR adds two options, `rootDir` and `outDir`, that allows the lint
rule to check the source files rather than depend on build artifacts.
The defaults are what we generate our plugins with.
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## Current Behavior
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## Expected Behavior
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## Related Issue(s)
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Fixes #
0720f3f9b4