adds default rte-content css as public asset

src/Umbraco.Web.UI.Client/public-assets/css/rte-content.css

@@ -0,0 +1,46 @@
+/* TODO => can we import uui colors? */
+:root {
+    --uui-palette-spanish-pink-light: rgb(248, 214, 211);
+}
+.umb-macro-holder {
+    border: 3px dotted var(--uui-palette-spanish-pink-light);
+    padding: 7px;
+    display: block;
+    margin: 3px;
+}
+
+.umb-macro-holder.loading {
+    background: url(assets/img/loader.gif) right no-repeat;
+    background-size: 18px;
+    background-position-x: 99%;
+}
+
+.embeditem {
+    position: relative;
+}
+
+.embeditem>* {
+    user-select: none;
+    pointer-events: none;
+}
+
+.embeditem[data-mce-selected] {
+    outline: 2px solid var(--uui-palette-spanish-pink-light);
+}
+
+.embeditem::before {
+    z-index: 1000;
+    width: 100%;
+    height: 100%;
+    position: absolute;
+    content: ' ';
+}
+
+.embeditem[data-mce-selected]::before {
+    background: rgba(0, 0, 0, 0.025);
+}
+
+*[data-mce-selected='inline-boundary'] {
+    background: rgba(0, 0, 0, 0.025);
+    outline: 2px solid var(--uui-palette-spanish-pink-light);
+}