Add Polish language setup and Hello Nextflow intro translation

[itrujnara]

• Add Polish to mkdocs.yml
• Add Polish glossary to TRANSLATION.md
• Add translation of index.md in Hello Nextflow

Do not merge this yet, as I need to find Polish-speaking reviewer(s) to check the linguistic side of this

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[mribeirodantas]

Thanks for starting this, @itrujnara! I messaged a couple polish Nextflow enthisiasts to check if they're available to help with / review the polish translation of the Hello Nextflow training 😉.

[mribeirodantas]

Hi @itrujnara. Do you plan to cotinue translating this training piece?

[itrujnara]

Hi @mribeirodantas, I am still interested in translating the training materials, but I haven't managed to find any other Polish-speaking Nextflow user to review the PRs, so this will have to stay in draft for some more time, unless you want me to close it instead.

[vdauwera]

Hi @mribeirodantas, I am still interested in translating the training materials, but I haven't managed to find any other Polish-speaking Nextflow user to review the PRs, so this will have to stay in draft for some more time, unless you want me to close it instead.

It's fine to keep it in draft for now. Would you like some help finding a reviewer?

[itrujnara]

Hi @vdauwera, help on this would be much appreciated