fix: Show generator description from external plopfiles

[rosen-kanev]

When loading generators from external plop files with plop.load(path) their description was being lost. The root cause is that the proxy object that we're passing to setGenerator() doesn't have a description property, which judging by the rest of the code is by design.

I did contemplate an alternative fix - to add the description in the setGenerator function like so:

// add the generator to this context
generators[name] = Object.assign(
  {},
  config.proxy ? { description: config.proxy.getGenerator(name) } : {},
  config,
  {
    name: name,
    basePath: plopfilePath,
  },
);

but IMO the patch should be where the external plop file is loaded.

This PR fixes the missing description logged in #247.

---

Aside: @piersolenski observed that setWelcomeMessage() also is being lost, but I don't think it's a good design to allow the loaded files to change it.

[crutchcorn]

Potentially weird Q: Is there overlap with this PR and this one? #394

[rosen-kanev]

When I stumbled upon the missing description I looked around the existing issues and PRs and did try #394 locally. The description is missing there too (though it would've been a very elegant bugfix if it was just a shallow copy 😅 )

[tobiashochguertel]

The fix in the commit #b89944ea8c4e9709c33491a87f80c81f7d378aeb works so far. Would it be possible to get this quick merged and released?

Can I do something?

[rosen-kanev]

@crutchcorn I don't like generating extra noise unless necessary, but in case you have your notifications turned on only for mentions.

[kemalsecer]

Are there plans to merge this fix in the near future?