Beam plotting tweaks

[bhazelton]

Description

A few minor improvements to beam plotting including:

• a refactor to allow the beam plotting to be called separately from a beam object
• better default colormaps (e.g. a cyclic colormap for phase) and new option for a user to pass a colormap.
• better default vmin/vmax for phase

Motivation and Context

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)
• Documentation change (documentation changes only)
• Version change
• Build or continuous integration change
• Other

Checklist:

• I have read the contribution guide.
• My code follows the code style of this project.

New feature checklist:

• I have added or updated the docstrings associated with my feature using the numpy docstring format.
• I have updated the tutorial to highlight my new feature (if appropriate).
• I have added/updated tests to cover my new feature.
• I have updated the CHANGELOG.

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 99.93%. Comparing base (a543c7a) to head (187cede).
⚠️ Report is 25 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff            @@
##             main    #1639    +/-   ##
========================================
  Coverage   99.93%   99.93%            
========================================
  Files          67       67            
  Lines       22619    22780   +161     
========================================
+ Hits        22605    22766   +161     
  Misses         14       14            

☔ View full report in Codecov by Sentry.
📢 Have feedback on the report? Share it here.

🚀 New features to boost your workflow:

• ❄️ Test Analytics: Detect flaky tests, report on failures, and find test suite problems.