docs: Docsy restore previous look on codeblocks

Signed-off-by: Mahe Tardy <[email protected]>

Author: mtardy

docs/assets/scss/codeblock.scss

@@ -2,9 +2,15 @@
 .td-content {
   .highlight {
     margin: 1.5rem 0;
+    border-radius: 0.25rem;
   }
 }
 
+// remove borders on general output without syntax highlighting
+:not(.highlight)>pre {
+   border: none;
+}
+
 // add border to codeblock inside of complex tab pane
 .tab-content {
   .tab-pane {