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/observability-monitoring/skills/distributed-tracing/SKILL.md

@@ -441,11 +441,6 @@ def process_request():
 - Use batch span processor
 - Check exporter configuration
 
-## Reference Files
-
-- `references/jaeger-setup.md` - Jaeger installation
-- `references/instrumentation.md` - Instrumentation patterns
-- `assets/jaeger-config.yaml.template` - Jaeger configuration
 
 ## Related Skills
 

plugins/observability-monitoring/skills/grafana-dashboards/SKILL.md

@@ -375,12 +375,6 @@ resource "grafana_folder" "monitoring" {
   notify: restart grafana
 ```
 
-## Reference Files
-
-- `assets/api-dashboard.json` - API monitoring dashboard
-- `assets/infrastructure-dashboard.json` - Infrastructure dashboard
-- `assets/database-dashboard.json` - Database monitoring dashboard
-- `references/dashboard-design.md` - Dashboard design guide
 
 ## Related Skills
 

plugins/observability-monitoring/skills/prometheus-configuration/SKILL.md

@@ -386,12 +386,6 @@ curl http://localhost:9090/api/v1/status/config
 curl 'http://localhost:9090/api/v1/query?query=up'
 ```
 
-## Reference Files
-
-- `assets/prometheus.yml.template` - Complete configuration template
-- `references/scrape-configs.md` - Scrape configuration patterns
-- `references/recording-rules.md` - Recording rule examples
-- `scripts/validate-prometheus.sh` - Validation script
 
 ## Related Skills
 

plugins/observability-monitoring/skills/slo-implementation/SKILL.md

@@ -326,11 +326,6 @@ rules:
 9. **Automate SLO reporting**
 10. **Use SLOs for prioritization**
 
-## Reference Files
-
-- `assets/slo-template.md` - SLO definition template
-- `references/slo-definitions.md` - SLO definition patterns
-- `references/error-budget.md` - Error budget calculations
 
 ## Related Skills