i18n(fr): update configuration-reference, modules/astro-assets & guides/images

[ArmandPhilippot]

Description (required)

Those three files have crossed links so I've updated the French translation of these files in the same PR with changes from #11901 and #11911.

I also brought more changes to:

• reference/modules/astro-assets to fix a malformed Markdown bold syntax and to translate some code snippets
• guides/images to match the updated i18n guide (ie. construction > compilation, etc.) and to fix some translated inline code.

And I fixed links in other files because of some updates I made in guides/images.

Related issues & labels (optional)

• Suggested label: i18n

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Tracked Files

File	Note
fr/guides/images.mdx	Localization changed, will be marked as complete.
fr/guides/migrate-to-astro/from-gatsby.mdx	Localization changed, will be marked as complete.
fr/guides/migrate-to-astro/from-nextjs.mdx	Localization changed, will be marked as complete.
fr/guides/migrate-to-astro/from-nuxtjs.mdx	Localization changed, will be marked as complete.
fr/guides/upgrade-to/v3.mdx	Localization changed, will be marked as complete.
fr/reference/configuration-reference.mdx	Localization changed, will be marked as complete.
fr/reference/content-loader-reference.mdx	Localization changed, will be marked as complete.
fr/reference/errors/local-image-used-wrongly.mdx	Localization changed, will be marked as complete.
fr/reference/modules/astro-assets.mdx	Localization changed, will be marked as complete.
fr/reference/modules/astro-content.mdx	Localization changed, 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.

[thomasbnt]

LGTM!