Reverse deprecation of pie chart properties

[maxkfranz]

Description of new feature

What should the new feature do? For visual features, include an image/mockup of the expected output.

Reverse the deprecation of the pie chart properties in the documentation.

Motivation for new feature

Describe your use case for this new feature.

More apps are relying on this, and we may expand the number of natively-supported charts in future.

Ref:

• Deprecate the pie properties #2789
• Node flags #3164
• Shape Bullseyes #3161
• See also: https://www.ndexbio.org/index.html

For reviewers

Reviewers should ensure that the following tasks are carried out for incorporated issues:

• Ensure that the reporter has adequately described their idea. If not, elicit more information about the use case. You should iteratively build a spec together.
• Ensure that the issue is a good fit for the core library. Some things are best done in extensions (e.g. UI-related features that aren't style-related). Some things are best done by app authors themselves -- instead of in Cytoscape libraries.
• The issue has been associated with a corresponding milestone.
• The commits have been incorporated into the unstable branch via pull request. The corresponding pull request is cross-referenced.