Initial commit - Application CLEO de gestion de devis

- Architecture MVC avec framework maison d6
- Modules : devis, clients, marchés, SAP
- Documentation initiale (README et TODO)
- Configuration Composer avec dépendances

🤖 Generated with [Claude Code](https://claude.ai/code)

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

pub/res/bs-icons-1.11.1/briefcase-fill.svg

@@ -0,0 +1,4 @@
+<svg xmlns="http://www.w3.org/2000/svg" width="16" height="16" fill="currentColor" class="bi bi-briefcase-fill" viewBox="0 0 16 16">
+  <path d="M6.5 1A1.5 1.5 0 0 0 5 2.5V3H1.5A1.5 1.5 0 0 0 0 4.5v1.384l7.614 2.03a1.5 1.5 0 0 0 .772 0L16 5.884V4.5A1.5 1.5 0 0 0 14.5 3H11v-.5A1.5 1.5 0 0 0 9.5 1h-3zm0 1h3a.5.5 0 0 1 .5.5V3H6v-.5a.5.5 0 0 1 .5-.5z"/>
+  <path d="M0 12.5A1.5 1.5 0 0 0 1.5 14h13a1.5 1.5 0 0 0 1.5-1.5V6.85L8.129 8.947a.5.5 0 0 1-.258 0L0 6.85v5.65z"/>
+</svg>