feat(skills): add IoT edge skills and align agent/instruction docs (#1431)

* feat(skills): add IoT edge skills and align agent/instruction docs

* fix(ci): handle fork permission errors in plugin structure check

* fix(ci): allow intentional Spanish vocabulary in codespell

* docs(skills): translate IoT edge skill content to English

* fix(ci): pass codespell and README validation

* chore: regenerate skills index after merge

skills/azure-smart-city-iot-solution-builder/references/smart-city-solution-template.md

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+# Smart City IoT Solution Template
+
+Use this template to standardize outputs for each new smart city scenario.
+
+## 1. Use case summary
+
+- Domain:
+- Stakeholders:
+- Problem statement:
+- Success metrics:
+
+## 2. Device and data profile
+
+- Device types and count:
+- Telemetry schema:
+- Ingestion rate:
+- Command/control requirements:
+- Retention policy:
+
+## 3. Reference architecture
+
+- Edge and field layer:
+- Ingestion layer:
+- Processing layer:
+- Storage layer:
+- API and integration layer:
+- Monitoring and security layer:
+
+## 4. NFR checklist
+
+- Availability target:
+- Latency target:
+- Security controls:
+- Data privacy constraints:
+- DR strategy:
+- Cost target:
+
+## 5. Phased roadmap
+
+### Phase 1 - Pilot
+
+- Scope:
+- Deliverables:
+- Exit criteria:
+
+### Phase 2 - Scale
+
+- Scope:
+- Deliverables:
+- Exit criteria:
+
+### Phase 3 - Optimize
+
+- Scope:
+- Deliverables:
+- Exit criteria:
+
+## 6. Initial backlog baseline
+
+- Epic: Device onboarding and identity
+- Epic: Telemetry ingestion and routing
+- Epic: Real-time alerting and incident workflow
+- Epic: Historical analytics and reporting
+- Epic: Security and compliance hardening
+- Epic: Governance and cost optimization
+
+## 7. Risks
+
+- Vendor/device interoperability gaps
+- Network reliability in field locations
+- Data quality issues and schema drift
+- Over-retention that increases costs
+- Ambiguity in operational ownership