docs(examples): add YAML frontmatter to 19 miscellaneous example files

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

examples/workflows/database-branch-setup.md

@@ -1,3 +1,9 @@
+---
+title: "Database Branch Setup with Worktrees"
+description: "Guide for isolated feature development using database branches with Neon or PlanetScale"
+tags: [workflow, git, devops]
+---
+
 # Database Branch Setup with Worktrees
 
 Complete guide for isolated feature development with database branches.

examples/workflows/memory-stack-integration.md

@@ -1,3 +1,9 @@
+---
+title: "Memory Stack Integration: Real-World Multi-Day Workflow"
+description: "5-day sprint example combining claude-mem, Serena, grepai and rg for auth refactoring"
+tags: [workflow, memory, integration]
+---
+
 # Memory Stack Integration: Real-World Multi-Day Workflow
 
 **Scenario**: Refactoring authentication system from session-based to JWT across a 5-day sprint

examples/workflows/remotion-quickstart.md

@@ -1,3 +1,9 @@
+---
+title: "Remotion + Claude Code Quickstart"
+description: "15-minute quickstart to create programmatic videos with Remotion and Claude Code"
+tags: [tutorial, workflow, integration]
+---
+
 # Remotion + Claude Code Quickstart
 
 **Objectif**: Créer votre première vidéo programmatique avec Remotion et Claude Code en 15 minutes.