docs(onboarding): add soul creation step

apps/macos/Sources/Clawdis/Onboarding.swift

@@ -1468,7 +1468,9 @@ struct OnboardingView: View {
             let kickoff =
                 "Hi! I just installed Clawdis and you’re my brand‑new agent. " +
                 "Please start the first‑run ritual from BOOTSTRAP.md, ask one question at a time, " +
-                "and guide me through choosing how we should talk (web‑only, WhatsApp, or Telegram)."
+                "and before we talk about WhatsApp/Telegram, visit soul.md with me to craft SOUL.md: " +
+                "ask what matters to me and how you should be. Then guide me through choosing " +
+                "how we should talk (web‑only, WhatsApp, or Telegram)."
             self.onboardingChatModel.input = kickoff
             self.onboardingChatModel.send()
         }