docs: add run process to layouting example

docs/examples/layout/ProcessNode.vue

@@ -0,0 +1,81 @@
+<script setup>
+import { toRef } from 'vue'
+import { Handle } from '@vue-flow/core'
+
+const props = defineProps({
+  data: {
+    type: Object,
+    required: true,
+  },
+  sourcePosition: {
+    type: String,
+  },
+  targetPosition: {
+    type: String,
+  },
+})
+
+const bgColor = toRef(() => {
+  if (props.data.hasError) {
+    return '#f87171'
+  }
+
+  if (props.data.isFinished) {
+    return '#10b981'
+  }
+
+  if (props.data.isRunning || props.data.isSkipped) {
+    // pick me a lighter color please
+    return '#6b7280'
+  }
+
+  return '#1a192b'
+})
+</script>
+
+<template>
+  <div class="process-node" :style="{ backgroundColor: bgColor }">
+    <Handle type="target" :position="targetPosition" />
+    <Handle type="source" :position="sourcePosition" />
+
+    <div style="display: flex; align-items: center; gap: 8px">
+      <div v-if="data.isRunning" class="spinner" />
+      <span v-else-if="data.hasError">&#x274C;</span>
+      <span v-else-if="data.isSkipped">&#x1F6A7;</span>
+      <span v-else>&#x1F4E6;</span>
+    </div>
+  </div>
+</template>
+
+<style scoped>
+.process-node {
+  padding: 10px;
+  color: white;
+  border: 1px solid #1a192b;
+  border-radius: 99px;
+  font-size: 10px;
+  width: 15px;
+  height: 15px;
+  display: flex;
+  align-items: center;
+  justify-content: center;
+}
+
+.spinner {
+  border: 2px solid #f3f3f3;
+  border-top: 2px solid #3498db;
+  border-radius: 50%;
+  width: 8px;
+  height: 8px;
+  animation: spin 1s linear infinite;
+}
+
+@keyframes spin {
+  0% {
+    transform: rotate(0deg);
+  }
+  100% {
+    transform: rotate(360deg);
+  }
+}
+</style>