Improve focal point editor to precisely set image focus for various aspect ratios

Refactor the `FocalPointEditor` component in `admin-gallery.tsx` to accurately map click coordinates on aspect ratio previews to the original image's focal point. This involves recalculating the mapping logic to account for image scaling and cropping (`object-fit: cover`). Additionally, new focal point data has been added to `server/gallery-focal-points.json`, and some image mappings in `server/cloudinary-gallery-map.json` have been adjusted.

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server/gallery-focal-points.json

@@ -50,5 +50,33 @@
   "DSC08350.jpg": {
     "x": 51,
     "y": 33
+  },
+  "Berny Blank 1.jpg": {
+    "x": 44,
+    "y": 31
+  },
+  "Christa Fartek und Robert F   1 .jpg": {
+    "x": 49,
+    "y": 27
+  },
+  "Die 3 K rntner 1.jpg": {
+    "x": 28,
+    "y": 36
+  },
+  "Die Zwirn 2.jpg": {
+    "x": 50,
+    "y": 29
+  },
+  "DSC07177.jpg": {
+    "x": 0,
+    "y": 0
+  },
+  "DSC07217.jpg": {
+    "x": 52,
+    "y": 0
+  },
+  "Adriana 1.jpg": {
+    "x": 100,
+    "y": 23
   }
 }