feat(examples): add nodejs_binary cluster example

[Toxicable]

Adds a basic example of how to use the clustering module in Nestjs.

It currently fails with

Error: Cannot find module 'examples_nestjs/src/app.module'
Require stack:
- /SNIP/execroot/examples_nestjs/bazel-out/darwin-fastbuild/bin/src/server.sh.runfiles/examples_nestjs/src/main.js

So also doubles as a test for the linker applying correctly to nodejs_binary
When this passes then this should be resolved #227

[alexeagle]

You say this currently fails, but the CI is green. What is left to do before merging?

[Toxicable]

@alexeagle It fails when I run the program locally, I guess there's no test that actually starts the program up.
I was also working on a parallel PR to add some e2e test for this example but run into some issues with some random node_module files being deleted

[Toxicable]

Added some testting here #1528

[alexeagle]

Could you rebase this please?