Missing e2e Tests

[AgentEnder]

Currently e2e / integration tests are only in place for the following 3 generators:

1. nx g @nx-dotnet/core:app
2. nx g @nx-dotnet/core:lib
3. nx g @nx-dotnet/core:project-reference

The existing tests are only partial, and all held in one file. They should be split up and new tests added for the new options (such as test project generation).

The following commands are missing e2e tests, and need to be added from scratch

1. [ ] nx g @nx-dotnet/core:nuget-reference
2. [ ] nx g @nx-dotnet/core:sync
3. [ ] nx g @nx-dotnet/core:init
4. [ ] nx g @nx-dotnet/core:restore
5. [ ] nx build my-app
6. [ ] nx test my-app-test
7. [ ] nx lint my-app
8. [ ] nx serve my-app
9. [x] nx dep-graph / print affected