feat(recipe): add customization of build file names recipe

[casungo]

Description (required)

This pull request introduces a new recipe page to the Astro documentation titled "Customizing Output File Names."

This recipe addresses the need for users to have more control over the naming and directory structure of their built assets (JavaScript, CSS, images, fonts, etc.). It explains how to leverage Vite's Rollup output options within the astro.config.mjs file to customize entryFileNames, chunkFileNames, and assetFileNames.

This content was previously part of the v4 documentation but was removed from the main configuration page as it's considered a more advanced use case. Creating it as a recipe makes this valuable information accessible to users who specifically need this customization, as suggested in issue #10348.

Related issues & labels (optional)

• Closes #10348
• Suggested label: recipe, add new content

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en/recipes/customizing-output-filenames.mdx	Localization added, will be marked as complete.

Warnings reference

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🔄️	The source for this localization has been updated since the creation of this pull request, make sure all changes in the source have been applied.

[sarah11918]

Just apologizing that I haven't had a chance to really get in and review this one carefully, but I'm hoping to get around to it soon!

[sarah11918]

Hey @casungo ! I took an editing pass on this to conform to some of the other recipe patterns and incorporate Hideoo's feedback. See what you think! (And of course, there may be typos etc.)

[sarah11918]

Other than not knowing exactly what to choose for a title, I think this one is ready for a @yanthomasdev final boss review!