chore: eliminar includes y command.md obsoletos

Limpieza post-migración a skills:

- Elimina carpeta includes/ (fragmentos {{include}} ya no se usan)
- Elimina templates/command.md (ya no hay commands)
- Actualiza install.sh: solo enlaza templates, skills, agents

Estructura final de .claude/:
- CLAUDE.md
- agents/
- settings.local.json
- skills/ (21 skills)
- templates/ (issue.md, skill.md)

install.sh

@@ -9,7 +9,7 @@ REPO_DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
 CLAUDE_DIR="$HOME/.claude"
 
 # Carpetas a enlazar (configuración compartible)
-FOLDERS=("commands" "includes" "templates" "skills" "agents")
+FOLDERS=("templates" "skills" "agents")
 
 echo "=== Instalando configuración de Claude ==="
 echo "Repositorio: $REPO_DIR/.claude"