[feat] new model selection screen

src/lib/UI/Arcodion.svelte

@@ -0,0 +1,15 @@
+<script lang="ts">
+    export let name = ""
+    let open = false
+</script>
+
+<div class="flex flex-col">
+    <button class="hover:bg-selected px-6 py-2 text-lg" class:bg-selected={open} on:click={() => {
+        open = !open
+    }}>{name}</button>
+    {#if open}
+        <div class="flex flex-col bg-darkbg">
+            <slot></slot>
+        </div>
+    {/if}
+</div>