[#1559] Added min/max/avg degree operators (static + evolution)

[ChrizZz110]

Description

• Static min degree operator added
• Static max degree operator added
• Min degree evolution operator added
• Max degree evolution operator added
• Avg degree evolution operator added

Related Issue

#1559

Motivation and Context

How Has This Been Tested?

Unit and Integration tests.

Types of Changes

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to change)

Checklist:

• My code follows the code style of this project.
• I have updated the documentation accordingly (if necessary).
• I have added tests to cover my changes.
• All new and existing tests passed.
• I ran a spell checker.

[ChrizZz110]

The output of the Evolution operators should be changed from timestamped degrees to intervals.