docs: adding a translation in Polish for the "examples" page

[kubamus]

✅ Checklist

• I have followed every step in the contributing guide (updated 2022-10-06).
• The PR title follows the convention we established conventional-commit

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Changelog

I added the "examples" page to the documentation with translation in Polish.

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Hey t3-oss/translators!

This PR contains changes to your language. Please review the changes ❤️.

PL: @matibox, @Infiplaya, @PiotrekPKP