Stub out story/controls and use code-mirror with vim for text-editing

src/ui/Controls.tsx

@@ -0,0 +1,34 @@
+
+type Props = {
+  // TODO
+}
+
+export function Controls(props: Props) {
+  return (
+    <aside
+      style={{
+        position: "sticky", 
+        top: "2rem", 
+        height: "fit-content"
+      }}
+    >
+      <article>
+        <header>Controls</header>
+
+        <fieldset>
+          <label>
+            <input type="checkbox" role="switch" checked />
+            Auto-evaluate
+          </label>
+          <button class="secondary outline" style={{ width: "100%" }}>
+            Clear All
+          </button>
+        </fieldset>
+
+        <footer>
+          <small>Language v0.1.0</small>
+        </footer>
+      </article>
+    </aside>
+  );
+}