Add set_automatic_layout() method to View

[yt-ms]

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Is your feature related to a problem? Please describe it.

I want to be able to easily switch on automatic layout for a View through an enable_automatic_layout() method.

Describe the solution you would like.

This should mirror the equivalent in the Java implementation, which sets the defaults to be:

• rank_direction = top_bottom
• rank_separation = 300
• node_separation = 600
• edge_separation = 200
• vertices = False