Automatically generate assets when creating a manifest with the Developer or Embedded API

The new auto_generate_assets property can be used to automatically generate the assets list of the specified folder when creating (Developer API / Embedded API) or updating (Developer API / Embedded API) a manifest. This new property eliminates the need to manually list each asset to be included in the created manifest. The auto_generate_assets property can be used in conjunction with the following new properties:

• include_test_cases: include test cases if specified, false by default
• include_data: include data if specified, false by default
• auto_run: start package generation automatically, false by default