fix(skills): remove phantom resource references and fix CoC links (#447)

Remove references to non-existent resource files (references/, assets/,
scripts/, examples/) from 115 skill SKILL.md files. These sections
pointed to directories and files that were never created, causing
confusion when users install skills.

Also fix broken Code of Conduct links in issue templates to use
absolute GitHub URLs instead of relative paths that 404.

plugins/cloud-infrastructure/skills/cost-optimization/SKILL.md

@@ -284,10 +284,6 @@ resource "aws_cloudwatch_metric_alarm" "cpu_high" {
 - **GCP:** Cost Management, Recommender
 - **Multi-cloud:** CloudHealth, Cloudability, Kubecost
 
-## Reference Files
-
-- `references/tagging-standards.md` - Tagging conventions
-- `assets/cost-analysis-template.xlsx` - Cost analysis spreadsheet
 
 ## Related Skills
 

plugins/cloud-infrastructure/skills/hybrid-cloud-networking/SKILL.md

@@ -230,10 +230,6 @@ az network vpn-connection show-device-config-script
 5. **Use Direct Connect** for high bandwidth
 6. **Implement caching** to reduce traffic
 
-## Reference Files
-
-- `references/vpn-setup.md` - VPN configuration guide
-- `references/direct-connect.md` - Direct Connect setup
 
 ## Related Skills
 

plugins/cloud-infrastructure/skills/istio-traffic-management/SKILL.md

@@ -319,9 +319,3 @@ istioctl proxy-config endpoints deploy/my-app
 # Debug traffic
 istioctl proxy-config log deploy/my-app --level debug
 ```
-
-## Resources
-
-- [Istio Traffic Management](https://istio.io/latest/docs/concepts/traffic-management/)
-- [Virtual Service Reference](https://istio.io/latest/docs/reference/config/networking/virtual-service/)
-- [Destination Rule Reference](https://istio.io/latest/docs/reference/config/networking/destination-rule/)

plugins/cloud-infrastructure/skills/linkerd-patterns/SKILL.md

@@ -303,9 +303,3 @@ linkerd viz tap deploy/my-app --to deploy/my-backend
 - **Don't over-configure** - Linkerd defaults are sensible
 - **Don't ignore ServiceProfiles** - They unlock advanced features
 - **Don't forget timeouts** - Set appropriate values per route
-
-## Resources
-
-- [Linkerd Documentation](https://linkerd.io/2.14/overview/)
-- [Service Profiles](https://linkerd.io/2.14/features/service-profiles/)
-- [Authorization Policy](https://linkerd.io/2.14/features/server-policy/)

plugins/cloud-infrastructure/skills/mtls-configuration/SKILL.md

@@ -340,10 +340,3 @@ linkerd viz tap deploy/my-app --to deploy/my-backend
 - **Don't ignore cert expiry** - Automate rotation
 - **Don't use self-signed certs** - Use proper CA hierarchy
 - **Don't skip verification** - Verify the full chain
-
-## Resources
-
-- [Istio Security](https://istio.io/latest/docs/concepts/security/)
-- [SPIFFE/SPIRE](https://spiffe.io/)
-- [cert-manager](https://cert-manager.io/)
-- [Zero Trust Architecture (NIST)](https://www.nist.gov/publications/zero-trust-architecture)

plugins/cloud-infrastructure/skills/multi-cloud-architecture/SKILL.md

@@ -169,10 +169,6 @@ AWS / Azure / GCP
 9. **Test disaster recovery** procedures
 10. **Train teams** on multiple clouds
 
-## Reference Files
-
-- `references/service-comparison.md` - Complete service comparison
-- `references/multi-cloud-patterns.md` - Architecture patterns
 
 ## Related Skills
 

plugins/cloud-infrastructure/skills/service-mesh-observability/SKILL.md

@@ -376,10 +376,3 @@ spec:
 - **Don't ignore cardinality** - Limit label values
 - **Don't skip dashboards** - Visualize dependencies
 - **Don't forget costs** - Monitor observability costs
-
-## Resources
-
-- [Istio Observability](https://istio.io/latest/docs/tasks/observability/)
-- [Linkerd Observability](https://linkerd.io/2.14/features/dashboard/)
-- [OpenTelemetry](https://opentelemetry.io/)
-- [Kiali](https://kiali.io/)

plugins/cloud-infrastructure/skills/terraform-module-library/SKILL.md

@@ -213,13 +213,6 @@ module "rds" {
 }
 ```
 
-## Reference Files
-
-- `assets/vpc-module/` - Complete VPC module example
-- `assets/rds-module/` - RDS module example
-- `references/aws-modules.md` - AWS module patterns
-- `references/azure-modules.md` - Azure module patterns
-- `references/gcp-modules.md` - GCP module patterns
 
 ## Testing