docs: fix config types (images, i18n)

[ArmandPhilippot]

Changes

• Fixes image.domains and image.remotePatterns default values (these options expect an array, not an object).

• De-duplicates the type for i18n (the JSDoc @type tag was set twice)

• Merge i18n.routing.manual description into i18n.routing and updates the example.

manual is not a key of i18n.routing but an available value. So it currently seems odd that this is listed with the available keys in the docs. And the example is not helpful, this is the one used for prefixDefaultLocale.

• Fixes the type of i18n.routing

Unless I'm mistaken, the Routing type doesn't exist so maybe it's better to use object? And, the value can also be "manual".

• Adds missing @docs tag to i18n.domains

The i18n.domains configuration is currently missing. I believe it's because the @docs tag was missing and I don't see any reason why it shouldn't appear in the docs since it is documented in the guides.

• Removes i18n.routing.strategy

If I'm not mistaken, this is a leftover from #10193 where i18n.routing.strategy: "pathname" became i18n.routing: "manual". The strategy key does not exist in the schema and doesn't seem to be used anywhere.
This key doesn't appear in the docs, so it's not a big deal, but Intellisense suggests it as an available option:

Testing

Existing tests should still pass, unless I'm wrong for i18n.routing.strategy.

Docs

This is docs so,
/cc @withastro/maintainers-docs for feedback
(mainly for the new description of i18n.routing)

I added a changeset just for merging the description of i18n.routing and i18n.routing.strategy as I think this is the "biggest" change. Should I include the other changes in this changeset/add more changesets?

[changeset-bot]

🦋 Changeset detected

Latest commit: 9eebe4f

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[codspeed-hq]

CodSpeed Performance Report

Merging #13374 will not alter performance

_{Comparing ArmandPhilippot:fix/configuration-reference (9eebe4f) with main (d83f92a)}

Summary

✅ 6 untouched benchmarks

[sarah11918]

This looks great! Thank you for cleaning this up! Approving for docs!

[ematipico]

Thank you for fixing this, it looks good to me