feat(core): support for workspace solution files

[AgentEnder]

Supports passing --solution {path}, or --solution to add a project to a specific or default solution file in the workspace. To use this behavior for all projects in the workspace, add a section to nx.json like

{
  //...
  generators: {
    //...
    "@nx-dotnet/core:app": {
      "solutionFile": true // or "MySolutionFile.sln" etc
    }
  }
}

Closes #241

[nx-cloud]

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Status	Command
	nx run-many --all --target=build
	nx run-many --target=e2e --all
	nx run-many --all --target=build
	nx affected --target=build --base=origin/master --parallel
	nx affected --target=lint --base=origin/master --parallel
	nx affected --target=test --base=origin/master --parallel
	nx affected --target=build --base=origin/master --parallel
	nx affected --target=test --base=origin/master --parallel
	nx affected --target=lint --base=origin/master --parallel

---

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[benjcallaghan]

LGTM. I especially like the e2e tests, which helped me understand what it was doing better than the documentation did.

[sonarqubecloud]

Kudos, SonarCloud Quality Gate passed!   

0 Bugs
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0.0% Duplication

[github-actions]

🎉 This PR is included in version 1.7.0 🎉

The release is available on:

• v1.7.0
• GitHub release

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[github-actions]

This pull request has been automatically locked since there has not been any recent activity after it was closed. Please open a new issue for related bugs.