SWF Editor - Integrate SWF diagram editor theme API with VsCode and Combined Editor

The goal of this task is to consume the SWF diagram editor API to set dark and light themes in VsCode and Combined editor.

The diagram editor theme shall be resposive to theme changes in the same way the text editor is.

Expected behavior in VsCode

• When new SWF diagram is loaded it should folow the current theme of the IDE and the text editor.
• The theme must remain the same if the workflow is edited from the text editor.
• With a workflow loaded, if the IDE theme is changed by the user, the diagram editor must be resposive to theme changes. 

Expected behavior Combined editor

• There is a swich button in editor's toolbar that changes the theme from light to dark and vice e versa. The diagram editor should be responsive to theme changes in the same way the text editor is.