resolves #9 include FontAwesome and admonition icons

resolves #9 (closed)

pages/assets/css/_base.css

@@ -1865,3 +1865,36 @@ pre code.hljs {
 .hljs-ln-code {
   padding-left: 10px;
 }
+
+i.fa[class^="icon-"],
+i.fa[class*=" icon-"]::before {
+  content: "";
+  height: 100%;
+  width: 1.75rem;
+  margin-left: -0.5rem;
+  display: inline-flex;
+  align-items: center;
+  justify-content: center;
+  border-radius: 0.5em 0 0 0.5em;
+  background: rgb(0 0 0 / 20%);
+}
+
+i.fa.icon-important::before {
+  content: "\f12a";
+}
+
+i.fa.icon-note::before {
+  content: "\f129";
+}
+
+i.fa.icon-tip::before {
+  content: "\f0eb";
+}
+
+i.fa.icon-caution::before {
+  content: "\f06d";
+}
+
+i.fa.icon-warning::before {
+  content: "\f071";
+}