Improving Assembly and adding a 3rd ZIP file with only the core

[agoncal]

I only include files instead of excluding files

Fix #388

[github-actions]

🚀 PR Preview 0b9f947 has been successfully built and deployed to https://quarkiverse-quarkus-workshops-pr-400-preview.surge.sh

[holly-cummins]

I think we should look into the file sizes a bit, and perhaps diff the before and after contents, and add a few <excludes> alongside the includes for the complete zip.

BIN +29.2 MB (2400%)
[quarkus-workshop-super-heroes/dist/quarkus-super-heroes-workshop-complete.zip](https://github.com/quarkusio/quarkus-workshops/pull/400/files#diff-dc822259003afc5364b4789e08bc9ef71ee5684b5afb0b4b60923f6d69df7134)
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Binary file added BIN +1.01 MB
[quarkus-workshop-super-heroes/dist/quarkus-super-heroes-workshop-core.zip](https://github.com/quarkusio/quarkus-workshops/pull/400/files#diff-57749a52640f73712a155ae951f1bb6101834932240dec8d4d868a738da6cea6)
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Binary file modified BIN -220 KB (61%)
[quarkus-workshop-super-heroes/dist/quarkus-super-heroes-workshop.zip](https://github.com/quarkusio/quarkus-workshops/pull/400/files#diff-96a6b76a4cf06f3ada3439e650bda96648ccb025f2c2907ad776036289db4080)

The workshop starter file shrank by 61%, but that's only 220kb. And I suspect the 'missing' content is the content we spotted in the workshop as 'shouldn't be there'. So probably all good, but maybe worth double-checking.

For the complete zip, it's gone up by 29mb, or 2400%. That seems like something's snuck in that shouldn't be there. Although, oddly, that's the file that changed the least.

[agoncal]

@holly-cummins yes, the workshop starter file shrank because I removed the load-super-heroes. One day we will turn it into a Quarkus CLI so we can add a new chapter "how to create a CLI with Quarkus"