i18n(fr): improve the wording in configuration-reference.mdx

[ArmandPhilippot]

Description (required)

Updates the French translation of reference/configuration-reference to bring changes from the French i18n guide and to improve the wording:

• add missing changes from the English version
• replace construction with compilation or génération where more appropriate
• replace prérendre with effectuer le prérendu
• do not translate serverless (same as headless)
• replace île with îlot
• replace le CLI with la CLI
• replace indicateur with option
• replace extension with module d'extension (plugin)
• fix some inline codes that were translated
• translate some examples

Related issues & labels (optional)

• Suggested label: i18n

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Tracked Files

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fr/guides/upgrade-to/v5.mdx	Localization changed, will be marked as complete.
fr/reference/configuration-reference.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.