feat: support template in all code blocks

src/execution/handlers/handlers.md.ts

@@ -0,0 +1,43 @@
+import { dirname, resolve } from 'path';
+import { toString } from 'mdast-util-to-string'
+import { execute, type ExecutionHandler } from '../execution.js';
+
+const fileHandler: ExecutionHandler = ({
+  addStep,
+  node,
+  parent,
+  index,
+  file,
+}) => {
+  if (node.type === 'leafDirective' && node.name === 'md') {
+    addStep({
+      type: 'file',
+      node,
+      action: async ({ context }) => {
+        const filePath = resolve(
+          dirname(file),
+          toString(node)
+        );
+        if (!filePath) {
+          throw new Error('File path is required');
+        }
+        const { root: newRoot } = await execute(filePath, {
+          context,
+        });
+        if (!parent) {
+          throw new Error('Parent node is required');
+        }
+        if (index === undefined) {
+          throw new Error('Index is required');
+        }
+        if (node.attributes?.hidden === '') {
+          parent.children?.splice(index, 1);
+          return;
+        }
+        parent.children?.splice(index, 1, ...newRoot.children as any);
+      },
+    })
+  }
+}
+
+export { fileHandler };