Added a ton of JS Doc

plug-api/syscalls/code_widget.ts

@@ -1,6 +1,13 @@
 import type { CodeWidgetContent } from "../types.ts";
 import { syscall } from "../syscall.ts";
 
+/**
+ * Renders a code widget.
+ * @param lang the language of the fenced code block
+ * @param body the body of the code to render
+ * @param pageName the name of the page the code widget appears on
+ * @returns the rendered code widget content
+ */
 export function render(
   lang: string,
   body: string,
@@ -9,7 +16,9 @@ export function render(
   return syscall("codeWidget.render", lang, body, pageName);
 }
 
-// Refresh all code widgets on the page that support it
+/**
+ * Refreshes all code widgets on the page that support it.
+ */
 export function refreshAll(): Promise<void> {
   return syscall("codeWidget.refreshAll");
 }