feat: implement portfolio dashboard with skill, experience, and message management features

prisma/schema.prisma

@@ -66,3 +66,16 @@ model Message {
 
   @@map("messages")
 }
+
+model Experience {
+  id            String   @id @default(uuid()) @db.Uuid
+  year          String
+  title         String
+  company       String
+  description   String   @db.Text
+  achievements  Json     @default("[]")
+  order         Int      @default(0)
+  createdAt     DateTime @default(now()) @map("created_at")
+
+  @@map("experiences")
+}