Add support for the public events for user API

[PierreBtz]

Description

This change adds support for https://docs.github.com/en/rest/activity/events?apiVersion=2022-11-28#list-public-events-for-a-user

Note: local run of mvn -D enable-ci clean install site fails on a totally untouched test, I made sure I didn't accidentally modify the stubs for this test but I'm out of ideas (ran with java 11, 17 is failing but I bet you are already aware :)).

Before submitting a PR:

• Changes must not break binary backwards compatibility. If you are unclear on how to make the change you think is needed while maintaining backward compatibility, CONTRIBUTING.md for details.
• Add JavaDocs and other comments as appropriate. Consider including links in comments to relevant documentation on https://docs.github.com/en/rest .
• Add tests that cover any added or changed code. This generally requires capturing snapshot test data. See CONTRIBUTING.md for details.
• Run mvn -D enable-ci clean install site locally. If this command doesn't succeed, your change will not pass CI.
• Push your changes to a branch other than main. You will create your PR from that branch.

When creating a PR:

• Fill in the "Description" above with clear summary of the changes. This includes:
  • If this PR fixes one or more issues, include "Fixes #" lines for each issue.
  • Provide links to relevant documentation on https://docs.github.com/en/rest where possible.
• All lines of new code should be covered by tests as reported by code coverage. Any lines that are not covered must have PR comments explaining why they cannot be covered. For example, "Reaching this particular exception is hard and is not a particular common scenario."
• Enable "Allow edits from maintainers".

[codecov]

Codecov Report

Patch coverage: 100.00% and project coverage change: +0.03 🎉

Comparison is base (afe6732) 79.86% compared to head (0fa0274) 79.89%.

Additional details and impacted files

@@             Coverage Diff              @@
##               main    #1642      +/-   ##
============================================
+ Coverage     79.86%   79.89%   +0.03%     
- Complexity     2191     2197       +6     
============================================
  Files           208      209       +1     
  Lines          6659     6670      +11     
  Branches        364      364              
============================================
+ Hits           5318     5329      +11     
  Misses         1127     1127              
  Partials        214      214              

Impacted Files	Coverage Δ
src/main/java/org/kohsuke/github/GitHub.java	82.51% <100.00%> (+0.23%)	⬆️

... and 4 files with indirect coverage changes

Help us with your feedback. Take ten seconds to tell us how you rate us. Have a feature suggestion? Share it here.

☔ View full report in Codecov by Sentry.
📢 Do you have feedback about the report comment? Let us know in this issue.