feat(docs): replace vitepress with vuepress

* vitepress too limited

docs/components/home/nodes/Box.vue

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+<script lang="ts" setup>
+import { Handle, Position } from '@braks/vue-flow'
+
+const emit = defineEmits(['next'])
+</script>
+<template>
+  <div class="px-4 py-2 shadow-lg rounded-md border-2 border-solid border-black">
+    <slot />
+    <Handle id="a" type="source" :position="Position.Bottom" />
+  </div>
+</template>

docs/components/home/nodes/Input.vue

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+<script lang="ts" setup>
+import { Handle, NodeProps, Position } from '@braks/vue-flow'
+
+interface RGBNodeProps extends NodeProps {
+  data: {
+    color: 'r' | 'g' | 'b'
+  }
+  amount: {
+    red: number
+    green: number
+    blue: number
+  }
+}
+const props = defineProps<RGBNodeProps>()
+const emit = defineEmits(['change'])
+let color = 'red'
+switch (props.data?.color) {
+  case 'r':
+    color = 'red'
+    break
+  case 'g':
+    color = 'green'
+    break
+  case 'b':
+    color = 'blue'
+    break
+}
+const onChange = (e: any) => emit('change', { color, val: e.target.value })
+</script>
+<template>
+  <div class="px-4 py-2 bg-white rounded-md border-2 border-solid border-black text-left transform scale-75 lg:scale-100">
+    <div class="text-md" :style="{ color }">{{ `${color} Amount`.toUpperCase() }}</div>
+    <input
+      v-model="props.amount[color]"
+      class="slider nodrag"
+      :style="{ '--color': color }"
+      type="range"
+      min="0"
+      max="255"
+      @input="onChange"
+    />
+    <Handle type="source" :position="Position.Right" :style="{ backgroundColor: color }" />
+  </div>
+</template>

docs/components/home/nodes/Output.vue

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+<script lang="ts" setup>
+import { Handle, NodeProps, Position } from "@braks/vue-flow";
+
+interface RBGOutputNodeProps extends NodeProps {
+  rgb: string;
+}
+
+const props = defineProps<RBGOutputNodeProps>();
+</script>
+<template>
+  <div :style="{ backgroundColor: props.rgb }"
+       class="px-6 py-2 rounded-xl text-white text-center min-w-[220px] border-2 border-white">
+    <div class="text-xl font-bold">Color Output</div>
+    <div class="font-semibold">{{ props.rgb }}</div>
+    <Handle type="target" :position="Position.Left" />
+  </div>
+</template>