[p5.js 2.0 Bug Report]: Spanish “Steward Guidelines” page is outdated (still mentions Grunt), please sync with English for 2.x

Most appropriate sub-area of p5.js?

• Accessibility
• Color
• Core/Environment/Rendering
• Data
• DOM
• Events
• Image
• IO
• Math
• Typography
• Utilities
• WebGL
• Build process
• Unit testing
• Internationalization
• Friendly errors
• Other (specify if possible)

p5.js version

2.x

Web browser and version

Any

Operating system

Linux

Steps to reproduce this

The Spanish version of the Steward Guidelines is out of date. It still references Grunt, while the English page has been updated for p5.js 2.x (no Grunt; uses npm scripts, ESLint, and Vitest). This can confuse Spanish readers.

Here's the file:
https://github.com/processing/p5.js/blob/dev-2.0/contributor_docs/es/steward_guidelines.md

English (source of truth): docs/en/stewards_guidelines.md

Contributors reading the Spanish docs may follow incorrect commands, it's expected that spanish page matches the English 2.x content.

For the reference, this was the issue: https://github.com/processing/p5.js/issues/7871

CC: @marioguzzzman

Compare contributor_docs/es/steward_guidelines.md with contributor_docs/steward_guidelines.md, using the English page as the source of truth. Update the Spanish content so it matches the p5.js 2.x guidance, including the npm scripts, ESLint, and Vitest references, and removes outdated Grunt instructions.