Astro v6.0

[sarah11918]

The branch for your docs for all Astro v6.0 PRs! (Astro Milestone: https://github.com/withastro/astro/milestone/37)

Deploy preview for this upgrade guide: https://deploy-preview-12322--astro-docs-2.netlify.app/en/guides/upgrade-to/v6/

Breaking changes (additions, removals, deprecations, stablizings...)

File to edit: v6 upgrade page: src/content/docs/en/guides/upgrade-to/v6.mdx

Use v5 upgrade guide as an example of format:

• Deployed: https://docs.astro.build/en/guides/upgrade-to/v5/
• Source file: src/content/docs/en/guides/upgrade-to/v5.mdx

Template

(More guidance available in the Astro Docs Docs guide to breaking changes)

<SourcePR number="11111" title="PR title"/>

### [changed/removed/added/deprecated]: feature/name/title/description
In Astro v5.x, [ a statement in the past tense about what Astro did/used to do.
e.g.  bundled all assets into several different folders....]

Astro v6.0 [ a statement in the present tense about how Astro works now.
e.g. now bundles all assets into one single folder located in... ]

#### What should I do?
// Active sentences in the imperative (command) tense
// include diff code examples whenever appropriate

e.g. Update... / Remove... / Replace... / Create...

<ReadMore>Learn more about [relevant feature/topic](/en/.../...).</ReadMore>

NB: Even if we decide to change up the format, e.g. organizing by topic vs by kind of change, or other options for easier scanning/readability, then at least providing the content in the same format from last year will give docs the information needed. We can move around/rearrange as needed.

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Tracked Files

File	Note
en/guides/upgrade-to/v6.mdx	Localization added, will be marked as complete.

Warnings reference

Icon	Description
🔄️	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.