ALL: Added Slovak translation

[dodog]

Added Slovak language translation

[github-actions]

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[dodog]

I have read the CLA Document and I hereby sign the CLA

[tessus]

Thanks for the translation. May I ask how this was done? I'm asking this because we had people submit automated translations and a lot of the translations won't be correct without knowing the context.

[dodog]

I translated everything by myself. I use Joplin on my computer and iPhone with its own Joplin server. I really like the app and wanted to contribute my bit. I only tested the translation strings visually because I was not able to load the translation file to the app and test it that way. If there is some simple way to do this, please let me know.

[tessus]

Awesome, thanks for the info.

@laurent22 I can't recall, whether we have to do something in particular for new translations. But I believe no extra steps have to be taken, correct? There were extra steps way in the past, but now I think we should be good. am I correct?