feat: add 11 new shopping icons and processing script

Add processed icons for glasnudeln, grünkohl, kokosnuss, lychee,
mangold, pak choi, pastinaken, reisnudeln, rettich, stroh 80, and
topinambur. Add ImageMagick script to remove Gemini watermark and
black background from raw icons. Update catalog and re-embed.

src/lib/data/shoppingIconCategories.json

@@ -397,5 +397,25 @@
   "räucherlachs": "Fleisch & Fisch",
   "tortilla wraps": "Pasta, Reis & Getreide",
   "wraps": "Haushalt",
-  "tortillas": "Pasta, Reis & Getreide"
+  "tortillas": "Pasta, Reis & Getreide",
+  "glasnudeln": "Pasta, Reis & Getreide",
+  "cellophane nudeln": "Pasta, Reis & Getreide",
+  "grünkohl": "Obst & Gemüse",
+  "kale": "Milchprodukte",
+  "kokosnuss": "Süßes & Snacks",
+  "kokos": "Süßes & Snacks",
+  "lychee": "Obst & Gemüse",
+  "litchi": "Obst & Gemüse",
+  "mangold": "Obst & Gemüse",
+  "pak choi": "Haushalt",
+  "bok choy": "Obst & Gemüse",
+  "pastinaken": "Süßes & Snacks",
+  "reisnudeln": "Pasta, Reis & Getreide",
+  "rice noodles": "Pasta, Reis & Getreide",
+  "rettich": "Gewürze & Saucen",
+  "daikon": "Brot & Backwaren",
+  "stroh 80": "Milchprodukte",
+  "stroh rum": "Milchprodukte",
+  "topinambur": "Gewürze & Saucen",
+  "jerusalem artichoke": "Obst & Gemüse"
 }