convert website from hugo to gatsby (#1369)

website/content/docs/widgets/file.md

@@ -0,0 +1,20 @@
+---
+label: "File"
+target: file
+---
+
+The file widget allows editors to upload a file or select an existing one from the media library. The path to the file will be saved to the field as a string.
+
+- **Name:** `file`
+- **UI:** file picker button opens media gallery
+- **Data type:** file path string, based on `media_folder`/`public_folder` configuration
+- **Options:**
+  - `default`: accepts a file path string; defaults to null
+- **Example:**
+
+  ```yaml
+  - label: "Manual PDF"
+    name: "manual_pdf"
+    widget: "file"
+    default: "/uploads/general-manual.pdf"
+  ```