feat: add draggable kanban using vue-draggable (#625)

src/views/components-demo/dragKanban.vue

@@ -0,0 +1,68 @@
+<template>
+  <div class="components-container board">
+    <Kanban :key="1" class="kanban todo" :list="list1" :options="options" header-text="Todo"/>
+    <Kanban :key="2" class="kanban working" :list="list2" :options="options" header-text="Working"/>
+    <Kanban :key="3" class="kanban done" :list="list3" :options="options" header-text="Done"/>
+  </div>
+</template>
+<script>
+import Kanban from '@/components/Kanban'
+
+export default {
+  name: 'dragKanban-demo',
+  components: {
+    Kanban
+  },
+  data() {
+    return {
+      options: {
+        group: 'mission'
+      },
+      list1: [
+        { name: 'Mission', id: 1 },
+        { name: 'Mission', id: 2 },
+        { name: 'Mission', id: 3 },
+        { name: 'Mission', id: 4 }
+      ],
+      list2: [
+        { name: 'Mission', id: 5 },
+        { name: 'Mission', id: 6 },
+        { name: 'Mission', id: 7 }
+      ],
+      list3: [
+        { name: 'Mission', id: 8 },
+        { name: 'Mission', id: 9 },
+        { name: 'Mission', id: 10 }
+      ]
+    }
+  }
+}
+</script>
+<style lang="scss">
+.board {
+  width: 1000px;
+  margin-left: 20px;
+  display: flex;
+  justify-content: space-around;
+  flex-direction: row;
+  align-items: flex-start;
+}
+.kanban {
+  &.todo {
+    .board-column-header {
+      background: #4A9FF9;
+    }
+  }
+  &.working {
+    .board-column-header {
+      background: #f9944a;
+    }
+  }
+  &.done {
+    .board-column-header {
+      background: #2ac06d;
+    }
+  }
+}
+</style>
+