[DOCS]: Improve spanish configuration docs

[Gojer16]

Description

Spanish configuration page docs contain inconsistent register, translation artifacts, and unclear terminology. This page is a core reference document, so consistency and precise wording are important for usability.

Plugins

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OpenCode version

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Steps to reproduce

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Screenshot and/or share link

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Operating System

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Terminal

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[github-actions]

This issue might be a duplicate of an existing issue. Please check:

• [Docs]: Spanish docs intro page has inconsistent register, and broken translations. #17558: Same author, same topic — Spanish docs with inconsistent register and translation artifacts (intro page vs configuration page)

If this is intentionally a separate report for a different page of the docs, please clarify in the issue. Otherwise, consider consolidating the feedback into #17558.