docs: translate CONTRIBUTING.md sections to Spanish

[ulises-jeremias]

Context

Project has bilingual branding. Add Spanish translation.

Task

Create CONTRIBUTING.es.md covering: CoC, getting started, PR workflow, finding issues, dev setup.

Files to create

• CONTRIBUTING.es.md

Verification

• Content matches structure of CONTRIBUTING.md
• Accurate Spanish translation

Steps

1. Create CONTRIBUTING.es.md covering: CoC, getting started, PR workflow, finding issues, dev setup.
2. CONTRIBUTING.es.md
3. Content matches structure of CONTRIBUTING.md
4. Accurate Spanish translation

Acceptance criteria

• Content matches structure of CONTRIBUTING.md
• Accurate Spanish translation

Files

See description for paths; grep the repo for related symbols if paths are incomplete.

How to verify

• Content matches structure of CONTRIBUTING.md
• Accurate Spanish translation

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Original issue text

Description

Project has bilingual branding. Add Spanish translation.

Task

Create CONTRIBUTING.es.md covering: CoC, getting started, PR workflow, finding issues, dev setup.

Files to create

• CONTRIBUTING.es.md

Verification

• Content matches structure of CONTRIBUTING.md
• Accurate Spanish translation