add search panel

src/components/landingpage/Search.vue

+<template>
+    <div class="search-container">
+        <Input v-model="keyword" class="search-input">
+            <Select v-model="selected" slot="prepend" style="width: 80px">
+                <Option value="archive">Archive</Option>
+                <Option value="cluster">Cluster</Option>
+            </Select>
+            <Button slot="append" icon="ios-search"></Button>
+        </Input>
+    </div>
+</template>
+<script>
+    export default {
+        data () {
+            return {
+                keyword:'',
+                selected: 'archive',
+                value12: '',
+                value13: '',
+                select1: 'http',
+                select2: 'com',
+                select3: 'day'
+            }
+        }
+    }
+</script>
+<style scoped>
+    .search-container{
+        width:100%;
+        height: 100%;
+        display: flex;
+        align-items: center;
+        justify-content: center;
+        background: #F0F0F0;
+    }
+    .search-input{
+        width:500px;
+    }
+</style>