add blog index to admin dashboard

admin/templates/html/blogs.html

@@ -0,0 +1,33 @@
+{{define "head"}}
+<title>Blog - ari melody 💫</title>
+<link rel="shortcut icon" href="/img/favicon.png" type="image/x-icon">
+<link rel="stylesheet" href="/admin/static/blog.css">
+{{end}}
+
+{{define "content"}}
+<main>
+    <header>
+        <h1>Blog Posts <small>({{.TotalPosts}} total)</small></h2>
+        <a class="button new" id="create-post">Create New</a>
+    </header>
+
+    {{if .Collections}}
+    <div class="blog-group">
+        {{range .Collections}}
+        {{if .Posts}}
+        <div class="blog-collection">
+            <h2>{{.Year}}</h2>
+            {{range .Posts}}
+            {{block "blogpost" .}}{{end}}
+            {{end}}
+        </div>
+        {{end}}
+        {{end}}
+    </div>
+    {{else}}
+    <p>There are no blog posts.</p>
+    {{end}}
+</main>
+
+<script type="module" src="/admin/static/blog.js"></script>
+{{end}}