Add MCP container icons (128x128 PNG + SVG sources)

icons/fritzbox-mcp.svg

@@ -0,0 +1,7 @@
+<svg xmlns="http://www.w3.org/2000/svg" width="128" height="128" viewBox="0 0 128 128">
+  <rect x="20" y="20" width="88" height="72" rx="12" fill="#E2001A"/>
+  <text x="64" y="62" font-family="Arial, sans-serif" font-size="20" font-weight="bold" fill="#FFFFFF" text-anchor="middle">FRITZ!</text>
+  <text x="64" y="82" font-family="Arial, sans-serif" font-size="14" font-weight="bold" fill="#FFFFFF" text-anchor="middle">Box</text>
+  <rect x="44" y="96" width="40" height="18" rx="4" fill="#E2001A"/>
+  <text x="64" y="109" font-family="Arial, sans-serif" font-size="11" font-weight="bold" fill="#FFFFFF" text-anchor="middle">MCP</text>
+</svg>