feat: stabilise CSP

[ematipico]

Changes

• Closes Stabilize CSP #14374

Testing

Tests should pass

Docs

withastro/docs#12859

[changeset-bot]

🦋 Changeset detected

Latest commit: 4afe02c

The changes in this PR will be included in the next version bump.

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[sarah11918]

Just a quick note re: the eventual accompanying docs PR to make after discussion:

• You do not need to make a separate CSP page in docs (at least, at this time) when you delete the experimental CSP page.

• The existing content at https://docs.astro.build/en/reference/experimental-flags/csp/ is reference entry material that can move to either Configuration Reference (configuration-reference.mdx) or the Render Context (api-reference.mdx) page. Try to adapt the runtime examples to our current format, including showing realistic examples of using both the Astro object and the context object.

• To keep our v6 docs branch PR fully updated with working links, the config reference content should be added directly into the v6 branch /en/reference/configuration-reference.mdx file (even though you will be warned that you shouldn't) in addition to preparing the JSDoc for config docs in this PR. At this stage, we don't have a great way of pulling in the JSDoc to this branch just yet, so we duplicate content for internal consistency and then our normal process will alert us of any discrepancies we need to tidy up later. This can also make it easier to finalize/polish the new docs where we can see them in place, then it can be easier to replicate that in the config types file.

[florian-lefebvre]

Looks nice! This will need a changeset

[sarah11918]

Quick review of changeset (and error message looks good) - I don't know if you want this same message for all the adapter minors, too, but for stabilizing flags, we've been just mentioning the removed flag, its replacement, and linking to the experimental flags section of the upgrade guide (as suggested below).

I'll review the content of the config docs in the docs PR to start (since that's easier 😄 ) and whatever we finalize there, we can update here.

[github-actions]

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