docs: overhaul and expand technical documentation

Revamped the documentation structure and content to enhance usability and organization. Added detailed sections on architecture, pipeline, security, API reference, deployment steps, compliance, and supported modules. Introduced new visuals like cards, accordions, and callouts for improved readability and navigation.

documentation/content/docs/_meta.json

@@ -1,10 +1,27 @@
 {
 	"index": "Introduction",
+	"---core---": {
+		"type": "separator",
+		"label": "Architecture Core"
+	},
 	"features": "Fonctionnalités",
 	"stack": "Stack Technologique",
 	"database": "Modèle de Données",
-	"api": "API & Intégrations",
+	"---security---": {
+		"type": "separator",
+		"label": "Sécurité & Conformité"
+	},
 	"security": "Sécurité",
 	"compliance": "Conformité (RGPD)",
+	"---api---": {
+		"type": "separator",
+		"label": "Intégrations & API"
+	},
+	"api": "API & Intégrations",
+	"api-reference": "Référence API",
+	"---ops---": {
+		"type": "separator",
+		"label": "Opérations"
+	},
 	"deployment": "Déploiement & Tests"
 }