implemented storing of tasks extended fields

frontend/src/routes/task/Add.svelte

@@ -15,7 +15,12 @@
     let task = $state({
         name : '',
         description : { source : '', rendered : '' },
-        members : {}
+        members : {},
+        estimated_time: null,
+        start_date: null,
+        due_date: null,
+        show_closed: false,
+        no_index: false
     });
     let router = useTinyRouter();
 
@@ -120,7 +125,7 @@
                     {t('estimated_time')}
                 </th>
                 <td>
-                    <input type="number" /> {t('hours')}
+                    <input type="number" bind:value={task.estimated_time} /> {t('hours')}
                 </td>
             </tr>
             <tr>
@@ -128,7 +133,7 @@
                     {t('start_date')}
                 </th>
                 <td>
-                    <input type="date" />
+                    <input type="date" bind:value={task.start_date} />
                 </td>
             </tr>
             <tr>
@@ -136,7 +141,7 @@
                     {t('due_date')}
                 </th>
                 <td>
-                    <input type="date" />
+                    <input type="date" bind:value={task.due_date} />
                 </td>
             </tr>
             <tr>
@@ -145,7 +150,7 @@
                 </th>
                 <td>
                     <label>
-                        <input type="checkbox" >
+                        <input type="checkbox" bind:checked={task.show_closed} >
                         {t('display_closed_tasks')}
                     </label>
                 </td>
@@ -156,7 +161,7 @@
                 </th>
                 <td>
                     <label>
-                        <input type="checkbox" >
+                        <input type="checkbox" bind:checked={task.no_index} >
                         {t('hide_on_index_page')}
                     </label>
                 </td>