Add media viewer module and media module component, modify attachment behavior

src/components/media_modal/media_modal.vue

@@ -0,0 +1,40 @@
+<template>
+  <div class="modal-view" v-if="showing" @click.prevent="hide">
+    <img class="modal-image" v-if="type === 'image'" :src="currentMedia.url"></img>
+    <video
+      class="modal-image"
+      v-if="type === 'video'"
+      :src="currentMedia.url"
+      @click.stop=""
+      controls autoplay
+      :loop="loopVideo"
+      @loadeddata="onVideoDataLoad">
+    </video>
+  </div>
+</template>
+
+<script src="./media_modal.js"></script>
+
+<style lang="scss">
+@import '../../_variables.scss';
+
+.modal-view {
+  z-index: 1005;
+  position: fixed;
+  width: 100vw;
+  height: 100vh;
+  top: 0;
+  left: 0;
+  display: flex;
+  justify-content: center;
+  align-items: center;
+  background-color: rgba(0, 0, 0, 0.5);
+  cursor: pointer;
+}
+
+.modal-image {
+  max-width: 90%;
+  max-height: 90%;
+  box-shadow: 0px 5px 15px 0 rgba(0, 0, 0, 0.5);
+}
+</style>