docs: add generated plugin reference pages

docs/plugins/reference/file-transfer.md

@@ -0,0 +1,19 @@
+---
+summary: "Fetch, list, and write files on paired nodes via dedicated node commands. Bypasses bash stdout truncation by using base64 over node.invoke for binaries up to 16 MB."
+read_when:
+  - You are installing, configuring, or auditing the file-transfer plugin
+title: "File Transfer plugin"
+---
+
+# File Transfer plugin
+
+Fetch, list, and write files on paired nodes via dedicated node commands. Bypasses bash stdout truncation by using base64 over node.invoke for binaries up to 16 MB.
+
+## Distribution
+
+- Package: `@openclaw/file-transfer`
+- Install route: included in OpenClaw
+
+## Surface
+
+contracts: tools