docs: add Spanish README

[webbrain-one]

Adds README.es-ES.md alongside the original documentation.

Generated by poolside/laguna-xs-2.1:free via OpenRouter.

Summary by CodeRabbit

• Documentation
  • Added Spanish-language documentation for the multi-module caching project.
  • Documented build and run instructions, required MySQL and Redis setup, Spring Boot configuration, and key cache properties.

[coderabbitai]

No actionable comments were generated in the recent review. 🎉

ℹ️ Recent review info

⚙️ Run configuration

Configuration used: defaults

Review profile: CHILL

Plan: Pro Plus

Run ID: 03e72017-efad-476a-9ada-4e608b395175

📥 Commits

Reviewing files that changed from the base of the PR and between 0a359db and 091173e.

📒 Files selected for processing (1)

• README.es-ES.md

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📝 Walkthrough

Walkthrough

Se añadió README.es-ES.md con documentación en español sobre la estructura del proyecto, los requisitos, la construcción, la ejecución, las dependencias de MySQL y Redis, el iniciador Spring Boot y la configuración de la caché en niveles.

Changes

Documentación del proyecto

Layer / File(s)	Summary
Guía del proyecto README.es-ES.md	La documentación describe los módulos Maven, los requisitos de JDK y Maven, los comandos de construcción y ejecución, la configuración de MySQL y Redis, el uso de @Cacheable, los gestores de caché y las propiedades cache.tiered.*.

Estimated code review effort: 1 (Trivial) | ~2 minutes

🚥 Pre-merge checks | ✅ 5

✅ Passed checks (5 passed)

Check name	Status	Explanation
Description Check	✅ Passed	Check skipped - CodeRabbit’s high-level summary is enabled.
Title check	✅ Passed	The title clearly and concisely describes the addition of the Spanish README documented in the changeset.
Docstring Coverage	✅ Passed	No functions found in the changed files to evaluate docstring coverage. Skipping docstring coverage check.
Linked Issues check	✅ Passed	Check skipped because no linked issues were found for this pull request.
Out of Scope Changes check	✅ Passed	Check skipped because no linked issues were found for this pull request.

✨ Finishing Touches

🧪 Generate unit tests (beta)

• Create PR with unit tests

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