refactor(developer-portal): split iace, docs, byoeh pages

Extract each page into colocated _components/ sections to bring
page.tsx files from 1008/891/769 LOC down to 57/23/21 LOC,
well within the 500-line hard cap.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

developer-portal/app/api/iace/_components/OnboardingSection.tsx

@@ -0,0 +1,57 @@
+'use client'
+
+import { ApiEndpoint, CodeBlock } from '@/components/DevPortalLayout'
+
+export function OnboardingSection() {
+  return (
+    <>
+      <h2>Onboarding</h2>
+      <p>Initialisierung aus Firmenprofil und Vollstaendigkeitspruefung.</p>
+
+      <ApiEndpoint method="POST" path="/sdk/v1/iace/projects/:id/init-from-profile" description="Projekt aus Company Profile und Compliance Scope initialisieren" />
+
+      <CodeBlock language="bash" filename="cURL">
+{`curl -X POST "https://api.breakpilot.io/sdk/v1/iace/projects/proj_a1b2c3d4/init-from-profile" \\
+  -H "Authorization: Bearer YOUR_API_KEY"`}
+      </CodeBlock>
+
+      <h3>Response (200 OK)</h3>
+      <CodeBlock language="json" filename="Response">
+{`{
+  "success": true,
+  "data": {
+    "initialized_fields": ["manufacturer", "description", "machine_type"],
+    "suggested_regulations": ["machinery_regulation", "low_voltage", "emc"],
+    "message": "Projekt aus Firmenprofil initialisiert. 3 Felder uebernommen."
+  }
+}`}
+      </CodeBlock>
+
+      <ApiEndpoint method="POST" path="/sdk/v1/iace/projects/:id/completeness-check" description="Vollstaendigkeitspruefung (25 Gates) durchfuehren" />
+
+      <CodeBlock language="bash" filename="cURL">
+{`curl -X POST "https://api.breakpilot.io/sdk/v1/iace/projects/proj_a1b2c3d4/completeness-check" \\
+  -H "Authorization: Bearer YOUR_API_KEY"`}
+      </CodeBlock>
+
+      <h3>Response (200 OK)</h3>
+      <CodeBlock language="json" filename="Response">
+{`{
+  "success": true,
+  "data": {
+    "score": 72,
+    "total_gates": 25,
+    "passed_gates": 18,
+    "gates": [
+      { "id": "G01", "name": "Maschinenidentifikation", "status": "passed" },
+      { "id": "G02", "name": "Komponentenliste", "status": "passed" },
+      { "id": "G03", "name": "Regulatorische Klassifizierung", "status": "passed" },
+      { "id": "G04", "name": "Gefahrenanalyse", "status": "warning", "message": "3 Gefahren ohne Massnahmen" },
+      { "id": "G05", "name": "Risikobewertung", "status": "failed", "message": "5 Gefahren nicht bewertet" }
+    ]
+  }
+}`}
+      </CodeBlock>
+    </>
+  )
+}