[Docs] Updating limitations page about CLI updates

[fellyph]

This pull request updates the documentation on WordPress Playground limitations, improving both the English and Spanish versions. The changes clarify technical details, update performance expectations, and add a new section highlighting recent improvements. The Spanish translation is also significantly enhanced for accuracy, clarity, and consistency with the English source.

Documentation improvements:

• Added a "Recent improvements" section to both English and Spanish docs, outlining resolved limitations such as large file downloads, PHP curl uploads, long-running PHP responses, and improved error handling for failed downloads. [1] [2]
• Updated performance expectations: clarified WASM file sizes (now 5–15MB per PHP version), initial memory allocation, and browser/device-specific performance notes. [1] [2]
• Improved explanations for iframe quirks, WP-CLI support, and how to persist work in Playground, with clearer instructions and more accurate technical details. [1] [2]

Spanish translation enhancements:

• Significantly revised the Spanish translation for accuracy, clarity, and consistency, including improvements to terminology, formatting, and explanatory comments.
• Updated Spanish content to match new English sections, including the "Recent improvements" section and revised guidance on performance, browser support, and development tips. [1] [2]

[Copilot]

Pull request overview

Updates the “Limitations” documentation to reflect recent Playground improvements, clarify performance expectations, and refine localized translations.

Changes:

• Expanded “Recent improvements” section describing resolved limitations (streaming downloads, cURL uploads, long-running responses, error handling).
• Updated performance expectations (WASM size, initial memory allocation) and refined wording for iframe quirks and WP-CLI usage.
• Refreshed localized docs (ES/FR/PT-BR) for clarity and closer alignment with the English source.

Reviewed changes

Copilot reviewed 4 out of 4 changed files in this pull request and generated 7 comments.

File	Description
packages/docs/site/docs/developers/24-limitations/01-index.md	Updates English limitations content (performance details, WP-CLI note, adds “Recent improvements”).
packages/docs/site/i18n/es/docusaurus-plugin-content-docs/current/developers/24-limitations/01-index.md	Updates Spanish translation and adds “Recent improvements”; aligns with updated English content.
packages/docs/site/i18n/fr/docusaurus-plugin-content-docs/current/developers/24-limitations/01-index.md	Updates French translation and adds “Recent improvements”; aligns with updated English content.
packages/docs/site/i18n/pt-BR/docusaurus-plugin-content-docs/current/developers/24-limitations/01-index.md	Updates pt-BR translation and adds “Recent improvements”; aligns with updated English content.

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[mho22]

I will probably need to review the FR version after the EN version has been updated.

[mho22]

Unfortunately this is not correct. WASM files are still between 15-30MB. But it was worse before MAIN_MODULE=2 [ 5MB heavier in some cases so it sometimes exceeded 30MB ] and this is probably due to some static libraries that should become dynamic ones, like Imagick, GD or Soap.