fix(plugins): Migrate filesystem usage to Node fs/fsPromises and upgrade smartfile to v13; add listFileTree helper and update tests

ts/plugins.ts

@@ -1,8 +1,34 @@
 // node native scope
-import * as path from 'path';
-import * as stream from 'stream';
+import * as path from 'node:path';
+import * as stream from 'node:stream';
+import * as fs from 'node:fs';
+import * as fsPromises from 'node:fs/promises';
 
-export { path, stream };
+export { path, stream, fs, fsPromises };
+
+/**
+ * List files in a directory recursively, returning relative paths
+ */
+export async function listFileTree(dirPath: string, _pattern: string = '**/*'): Promise<string[]> {
+  const results: string[] = [];
+
+  async function walkDir(currentPath: string, relativePath: string = '') {
+    const entries = await fsPromises.readdir(currentPath, { withFileTypes: true });
+    for (const entry of entries) {
+      const entryRelPath = relativePath ? path.join(relativePath, entry.name) : entry.name;
+      const entryFullPath = path.join(currentPath, entry.name);
+
+      if (entry.isDirectory()) {
+        await walkDir(entryFullPath, entryRelPath);
+      } else if (entry.isFile()) {
+        results.push(entryRelPath);
+      }
+    }
+  }
+
+  await walkDir(dirPath);
+  return results;
+}
 
 // @pushrocks scope
 import * as smartfile from '@push.rocks/smartfile';