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/hr-legal-compliance/skills/employment-contract-templates/SKILL.md

@@ -518,10 +518,3 @@ Date: ************\_************
 - **Don't discriminate** - In language or application
 - **Don't forget at-will language** - Where applicable
 - **Don't skip review** - Have legal counsel review all documents
-
-## Resources
-
-- [SHRM Employment Templates](https://www.shrm.org/)
-- [Department of Labor](https://www.dol.gov/)
-- [EEOC Guidance](https://www.eeoc.gov/)
-- State-specific labor departments

plugins/hr-legal-compliance/skills/gdpr-data-handling/SKILL.md

@@ -622,9 +622,3 @@ class BreachNotificationHandler:
 - **Don't retain indefinitely** - Define and enforce retention
 - **Don't ignore DSARs** - 30-day response required
 - **Don't transfer without safeguards** - SCCs or adequacy decisions
-
-## Resources
-
-- [GDPR Full Text](https://gdpr-info.eu/)
-- [ICO Guidance](https://ico.org.uk/for-organisations/guide-to-data-protection/guide-to-the-general-data-protection-regulation-gdpr/)
-- [EDPB Guidelines](https://edpb.europa.eu/our-work-tools/general-guidance/gdpr-guidelines-recommendations-best-practices_en)