feat(events): AppSync Events Library

[tylerjroach]

• PR title and description conform to Pull Request guidelines.

Issue #, if available:

Description of changes:

How did you test these changes?
(Please add a line here how the changes were tested)

Documentation update required?

• No
• Yes (Please include a PR link for the documentation update)

General Checklist

• Added Unit Tests
• Added Integration Tests
• Security oriented best practices and standards are followed (e.g. using input sanitization, principle of least privilege, etc)
• Ensure commit message has the appropriate scope (e.g fix(storage): message, feat(auth): message, chore(all): message)

By submitting this pull request, I confirm that my contribution is made under the terms of the Apache 2.0 license.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 42.08%. Comparing base (efef6b1) to head (5cc326d).
Report is 1 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #3046   +/-   ##
=======================================
  Coverage   42.08%   42.08%           
=======================================
  Files         992      992           
  Lines       31544    31544           
  Branches     4648     4648           
=======================================
  Hits        13274    13274           
- Misses      16807    16809    +2     
+ Partials     1463     1461    -2     

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