Don't add to graph scripts missing from package.json

[Philip-Scott]

Avoid adding packages to build graph when not specified. This will be highly impactful for our build times of our PR Deployment environment as we'd be able to just bundle packages, we deploy to this environment instead of the full repo. In our build pipelines where we need to build everything, we can add build to the Lage tasks.

Manual Validation

Within our team's repo, I was able to confirm that running lage test ran all test tasks our team has, and avoided building packages without tests and that were not in any dependency path. We went from having to build 117 packages to 108.

I can share the results with you privately to avoid sharing any private package names here :)

Fixes #592

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[kenotron]

So, we really can't assume knowledge of whether to add something to the graph or not here in this package. We may need to factor the workspace target graph builder OUT of this package so it can know about "runners". The runners themselves tell you whether the target "shouldRun()" something. Based on that flag, then we can determine if the graph should be trimmed or not.

[kenotron]

Please check my message. If you're up for it, we can chat more offline about the approach.

[kenotron]

Here's what to do next:

1. move WorkspaceTargetGraphBuilder to cli package
2. pull in TargetRunnerPicker as a constructor dependency to the WorkspaceTargetGraphBuilder
3. replace the conditional to use the shouldRun() function of the picked runner to skip "entries" target in WTGBuilder
4. please add WTGBuilder test to cover the cases as we drew here:

[Philip-Scott]

pipeline: {
  transpile: [],
  types: ['^types']
  copy: ['transpile']
  bundle: ['copy', '^transpile'],
  
}

root package.json {
  build: lage transpile types
}