add + (plus) button for addition of Vorgaenge and Crimes

src/lib/components/ExpandableForm.svelte

@@ -0,0 +1,53 @@
+<script lang="ts">
+  import { fly, scale, fade } from 'svelte/transition';
+  import { cubicOut } from 'svelte/easing';
+  import { tick } from 'svelte';
+
+  let expanded = false;
+  let formContainer: HTMLDivElement;
+
+  async function toggle() {
+    expanded = !expanded;
+
+    if (expanded) {
+      // Wait for DOM to update
+      await tick();
+
+      // Scroll smoothly into view
+      formContainer?.scrollIntoView({ behavior: 'smooth', block: 'start' });
+    }
+  }
+</script>
+
+<div class="flex flex-col items-center">
+  <!-- + / × button -->
+  <button
+    class="flex items-center justify-center w-12 h-12 rounded-full bg-blue-600 text-white text-2xl font-bold hover:bg-blue-700 transition"
+    on:click={toggle}
+    aria-expanded={expanded}
+    aria-label="Add item"
+  >
+    {#if expanded}
+      ✕
+    {:else}
+      +
+    {/if}
+  </button>
+
+  <!-- Expandable content below button -->
+  {#if expanded}
+    <div
+      bind:this={formContainer}
+      class="w-full mt-4 flex justify-center"
+      transition:fade
+    >
+      <div
+        in:fly={{ y: 10, duration: 200, easing: cubicOut }}
+        out:scale={{ duration: 150 }}
+        class="w-full max-w-2xl"
+      >
+        <slot />
+      </div>
+    </div>
+  {/if}
+</div>