feat: add revops and sales-enablement skills

Fill the revenue operations and internal sales collateral gaps in the
marketing skills collection. revops covers lead lifecycle, scoring,
routing, pipeline management, and CRM automation. sales-enablement
covers pitch decks, one-pagers, objection handling, demo scripts, and
sales playbooks. Cross-references added to 6 existing skills.

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

skills/analytics-tracking/SKILL.md

@@ -306,3 +306,4 @@ For implementation, see the [tools registry](../../tools/REGISTRY.md). Key analy
 - **ab-test-setup**: For experiment tracking
 - **seo-audit**: For organic traffic analysis
 - **page-cro**: For conversion optimization (uses this data)
+- **revops**: For pipeline metrics, CRM tracking, and revenue attribution