add user autosuggest component

src/components/user_autosuggest/user_autosuggest.vue

@@ -0,0 +1,93 @@
+<template>
+  <div class="user-autosuggest">
+    <VueAutosuggest
+      :suggestions="suggestions"
+      :inputProps="inputProps"
+      @click="clickHandler"
+		>
+      <template slot-scope="{suggestion}">
+        <BasicUserCard :user="suggestion.item" />
+      </template>
+    </VueAutosuggest>
+  </div>
+</template>
+
+<script src="./user_autosuggest.js"></script>
+
+<style lang="scss">
+.user-autosuggest {
+  .avatar {
+    height: 25px;
+    width: 25px;
+    border-radius: 20px;
+    margin-right: 10px;
+  }
+  #autosuggest__input {
+    outline: none;
+    position: relative;
+    display: block;
+    border: 1px solid #616161;
+    padding: 10px;
+    width: 100%;
+    box-sizing: border-box;
+    -webkit-box-sizing: border-box;
+    -moz-box-sizing: border-box;
+  }
+
+  #autosuggest__input.autosuggest__input-open {
+    border-bottom-left-radius: 0;
+    border-bottom-right-radius: 0;
+  }
+
+  .autosuggest__results-container {
+    position: relative;
+    width: 100%;
+  }
+
+  .autosuggest__results {
+    font-weight: 300;
+    margin: 0;
+    position: absolute;
+    z-index: 10000001;
+    width: 100%;
+    border: 1px solid #e0e0e0;
+    border-bottom-left-radius: 4px;
+    border-bottom-right-radius: 4px;
+    background: white;
+    padding: 0px;
+    max-height: 400px;
+    overflow-y: scroll;
+  }
+
+  .autosuggest__results ul {
+    list-style: none;
+    padding-left: 0;
+    margin: 0;
+  }
+
+  .autosuggest__results .autosuggest__results_item {
+    cursor: pointer;
+    padding: 15px;
+  }
+
+  #autosuggest ul:nth-child(1) > .autosuggest__results_title {
+    border-top: none;
+  }
+
+  .autosuggest__results .autosuggest__results_title {
+    color: gray;
+    font-size: 11px;
+    margin-left: 0;
+    padding: 15px 13px 5px;
+    border-top: 1px solid lightgray;
+  }
+
+  .autosuggest__results .autosuggest__results_item:active,
+  .autosuggest__results .autosuggest__results_item:hover,
+  .autosuggest__results .autosuggest__results_item:focus,
+  .autosuggest__results
+    .autosuggest__results_item.autosuggest__results_item-highlighted {
+    background-color: #f6f6f6;
+  }
+}
+</style>