Add ColorPicker component

src/lib/components/ColorPicker.svelte

@@ -0,0 +1,51 @@
+<script lang="ts">
+  import { createEventDispatcher } from "svelte";
+
+  const dispatch = createEventDispatcher();
+  export let color = "#ff0000";
+
+  function handleColorChange(event: Event) {
+    const target = event.target as HTMLInputElement;
+    color = target.value;
+    dispatch("change", color);
+  }
+  export let borderRadius;
+  const actualBorderRadius = borderRadius || "50%";
+</script>
+
+<div class="color-picker" style="border-radius: {actualBorderRadius};">
+  <label style="border-radius: inherit;">
+    <input type="color" bind:value={color} on:input={handleColorChange} />
+    <div
+      class="color-circle"
+      style="background-color: {color || '#000'};"
+    ></div>
+  </label>
+</div>
+
+<style>
+  .color-picker {
+    position: relative;
+    display: inline-block;
+  }
+
+  .color-picker input[type="color"] {
+    position: absolute;
+    left: 0;
+    top: 0;
+    width: 100%;
+    height: 100%;
+    opacity: 0;
+    cursor: pointer;
+    border-radius: inherit;
+  }
+
+  .color-picker .color-circle {
+    width: var(--color-picker-size, 40px);
+    height: var(--color-picker-size, 40px);
+    border-radius: inherit;
+    display: flex;
+    align-items: center;
+    justify-content: center;
+  }
+</style>