docs: enable shell-session syntax

src/components/shell_block.jsx

@@ -0,0 +1,11 @@
+import RenderCodeBlock from "@theme/CodeBlock";
+
+const ShellBlock = ({ children }) => {
+  return (
+    <RenderCodeBlock className={`language-console`}>
+      {children}
+    </RenderCodeBlock>
+  );
+};
+
+export default ShellBlock;