terminal: KAM (mode 2)

This has an associated config `vt-kam-allowed` which defaults to "false"
since this mode can cause the terminal to become mostly unusable. We
include this mode for completions sake however.

website/components/VTMode.tsx

@@ -0,0 +1,18 @@
+export default function VTMode({
+  value,
+  ansi = false,
+}: {
+  value: number;
+  ansi: boolean;
+}) {
+  return (
+    <div className="flex my-2.5">
+      <div className="border px-1 grid grid-rows-2 grid-cols-1 text-center">
+        <div>
+          {ansi ? "?" : ""}
+          {value}
+        </div>
+      </div>
+    </div>
+  );
+}