Add Ente Photos service template files

- Add ente-photos.yaml template with museum, postgres, and minio services
- Add custom SVG logo for Ente Photos
- Update service templates JSON files with new template

public/svgs/ente-photos.svg

@@ -0,0 +1,27 @@
+<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 256 256" width="256" height="256">
+  <defs>
+    <linearGradient id="gradient" x1="0%" y1="0%" x2="100%" y2="100%">
+      <stop offset="0%" style="stop-color:#00D4AA;stop-opacity:1" />
+      <stop offset="100%" style="stop-color:#00A693;stop-opacity:1" />
+    </linearGradient>
+  </defs>
+  <rect width="256" height="256" rx="32" fill="url(#gradient)"/>
+  <g fill="white">
+    <!-- Camera body -->
+    <rect x="64" y="96" width="128" height="96" rx="16" fill="white"/>
+    <!-- Camera lens -->
+    <circle cx="128" cy="144" r="32" fill="url(#gradient)"/>
+    <circle cx="128" cy="144" r="20" fill="white"/>
+    <circle cx="128" cy="144" r="12" fill="url(#gradient)"/>
+    <!-- Camera flash -->
+    <rect x="160" y="104" width="16" height="8" rx="4" fill="url(#gradient)"/>
+    <!-- Viewfinder -->
+    <rect x="96" y="80" width="64" height="8" rx="4" fill="white"/>
+    <!-- Lock icon overlay -->
+    <g transform="translate(180, 180)">
+      <rect x="0" y="8" width="24" height="16" rx="2" fill="white"/>
+      <path d="M6 8V6a6 6 0 0 1 12 0v2" stroke="white" stroke-width="2" fill="none"/>
+      <circle cx="12" cy="16" r="2" fill="url(#gradient)"/>
+    </g>
+  </g>
+</svg>