feat(dashboar): Added total donors to overview

src/components/dashboard/MainDashContent.svelte

@@ -73,6 +73,26 @@
           ><polyline points="22 12 18 12 15 21 9 3 6 12 2 12" /></svg
         >
       </StatCard>
+      <StatCard
+        title={$_("total-donors")}
+        value={stats.total_donors}
+        href="/donors/"
+      >
+        <svg
+          stroke="currentColor"
+          fill="currentColor"
+          stroke-width="2"
+          viewBox="0 0 24 24"
+          stroke-linecap="round"
+          stroke-linejoin="round"
+          size="24"
+          class="stroke-current text-grey-500"
+          height="24"
+          width="24"
+          xmlns="http://www.w3.org/2000/svg"
+          ><polyline points="22 12 18 12 15 21 9 3 6 12 2 12" /></svg
+        >
+      </StatCard>
       <StatCard
         title={$_("total-donations")}
         value={`${(stats.total_donation / 100).toFixed(2)} €`}