Initiële commit: VibeFinance 3-container opzet

Basislijn van de bestaande applicatie (Vite/React frontend, Express
backend, PostgreSQL) zoals die in de index stond, plus dev-, release-
en documentatiescripts.

Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>

frontend/public/favicon.svg

@@ -0,0 +1,15 @@
+<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 32 32">
+  <defs>
+    <linearGradient id="bg" x1="0%" y1="0%" x2="100%" y2="100%">
+      <stop offset="0%" stop-color="#0eddd4"/>
+      <stop offset="100%" stop-color="#0891b2"/>
+    </linearGradient>
+  </defs>
+  <rect width="32" height="32" rx="8" fill="url(#bg)"/>
+  <polyline
+    points="4,24 10,15 16,19 22,9 28,13"
+    fill="none" stroke="#ffffff" stroke-width="3"
+    stroke-linejoin="round" stroke-linecap="round"/>
+  <line x1="4" y1="27" x2="28" y2="27"
+    stroke="rgba(255,255,255,0.35)" stroke-width="1.5"/>
+</svg>