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/database.mdx

@@ -17,12 +17,16 @@ erDiagram
     USER ||--o{ SESSION : "detient"
     USER ||--o{ API_KEY : "genere"
     USER ||--o{ AUDIT_LOG : "genere"
+    USER ||--o{ FAVORITE : "ajoute"
     
     CONTENT ||--o{ CONTENT_TAG : "possede"
     TAG ||--o{ CONTENT_TAG : "est_lie_a"
     CONTENT ||--o{ REPORT : "est_signale"
+    CONTENT ||--o{ FAVORITE : "est_mis_en"
     TAG ||--o{ REPORT : "est_signale"
 
+    CATEGORY ||--o{ CONTENT : "catégorise"
+
     ROLE ||--o{ USER_ROLE : "attribue_a"
     ROLE ||--o{ ROLE_PERMISSION : "possede"
     PERMISSION ||--o{ ROLE_PERMISSION : "est_lie_a"
@@ -93,15 +97,32 @@ erDiagram
     contents {
         uuid id PK
         uuid user_id FK
+        uuid category_id FK
         content_type type
         varchar title
         varchar storage_key
         varchar mime_type
         integer file_size
+        integer views
+        integer usage_count
         timestamp created_at
         timestamp updated_at
         timestamp deleted_at
     }
+    categories {
+        uuid id PK
+        varchar name
+        varchar slug
+        varchar description
+        varchar icon_url
+        timestamp created_at
+        timestamp updated_at
+    }
+    favorites {
+        uuid user_id PK, FK
+        uuid content_id PK, FK
+        timestamp created_at
+    }
     tags {
         uuid id PK
         varchar name
@@ -182,6 +203,9 @@ erDiagram
         timestamp created_at
     }
 
+    users ||--o{ favorites : "user_id"
+    contents ||--o{ favorites : "content_id"
+    categories ||--o{ contents : "category_id"
     users ||--o{ contents : "user_id"
     users ||--o{ users_to_roles : "user_id"
     roles ||--o{ users_to_roles : "role_id"