preparing editing of stock items

Signed-off-by: Stephan Richter <s.richter@srsoftware.de>

frontend/src/routes/stock/ItemProps.svelte

@@ -1,4 +1,5 @@
 <script>
+    import { t} from '../../translations.svelte';
     let { item } = $props();
 </script>
 
@@ -17,6 +18,20 @@
             </td>
         </tr>
         {/each}
+        <tr>
+            <td>
+                <select>
+                    <option>this is an existing property</option>
+                    <option>B</option>
+                    <option>C</option>
+                </select><br/>
+                <input type="text" placeholder="new prop"/>
+            </td>
+            <td>
+                <input type="text" />
+                <button>{t('save')}</button>
+            </td>
+        </tr>
     </tbody>
 </table>
 {/if}