chore(examples): add new example for export document

Author: loonghao

examples/export_document.py

@@ -0,0 +1,22 @@
+# Import built-in modules
+import os
+from tempfile import mkdtemp
+
+# Import third-party modules
+import examples._psd_files as psd  # Import from examples.
+
+# Import local modules
+from photoshop import Session
+
+
+PSD_FILE = psd.get_psd_files()
+
+if __name__ == "__main__":
+    psd_file = PSD_FILE["export_layers_as_png.psd"]
+    with Session(psd_file, action="open", auto_close=True) as ps:
+        opts = ps.ExportOptionsSaveForWeb()
+
+        png_file = os.path.join(mkdtemp(), "test.png")
+        active_document = ps.app.activeDocument
+        active_document.exportDocument(png_file, ps.ExportType.SaveForWeb, opts)
+        os.startfile(png_file)