Prepare Polish language for v2.13

[kamilst96]

Changes:

• SoftDeletes & Wizard support.
• Changed "Ładowanie..." to "Wczytywanie...". Seems more appropriate.
• [?] Move from action & action another to action & continue for consecutive actions.
• [?] Made a few changes to action result messages.

@lolen will you have a moment to review? Let's keep it as draft until review or until v2.13.

[lolen]

I'm worried about is returns:

• Rekord utworzony
• Rekord usunięty
• Rekord przywrócony

They only concern a single record. I don't know if multiple records can be selected. And this is universal:

• Utworzono
• Usunięto
• Przywrócono

[?] Move from action & action another to action & continue for consecutive actions.

Another concern I have is that "Continue" may be difficult for the user to read. And in the original it is "Create & create another" and the user knows what the next action is.

The rest without complaint. Great job.

[kamilst96]

@lolen I was expecting push back on these, hence the question marks. Reverted both.

Rekord utworzony - I am not aware of being able to create more than one object at once. Rekord usunięty and Rekord przywrócony also have plural forms Rekordy usunięte and Rekordy przywrócone. It depends on whether single or multiple index is used. At least that's what I'm thinking.

[kamilst96]

@danharrin I marked it by accident, but I think it's alright. @lolen ?

[lolen]

Good job 👍