docs: polish translation

[Dekier]

No description provided.

[alvarosabu]

Hi @Dekier thanks for taking care of this. We recently merged the Cookbook section #557 so we will need to update the PR.

Steps:

The .md files under the examples directory are the same ones used in the cookbook, so just rename the directory from pl/examples to pl/cookbook.

• Add a pl/cookbook/index.md like this https://github.com/Tresjs/tres/pull/558/files#diff-65c3e40a0b2bdcfae6c3be42b004bfa4e079a250fefed0fca56af95b33a209ca
• Add the correspondent translated frontmatter meta to each one of the .md files inside the cookbook, like this https://github.com/Tresjs/tres/pull/558/files#diff-587026bcdc81388b1c6b391cdbdd7c2184a16b752a489c544a9d91c9e4b8f674
• Update the config links https://github.com/Tresjs/tres/pull/558/files#diff-d9b1069ba7dab3215b86ba2b70b13a13977d3c09c11bdd8d468a0d7e8c686641

If you have any questions or you need help with this, let me know 🙏🏻

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