Add AGENTS.md

[jonesbusy]

Description

Add AGENTS.md

Testing done

None

Submitter checklist

• I have read and understood the CONTRIBUTING guide
• I have run mvn license:update-file-header, mvn spotless:apply, pre-commit run -a, mvn clean install before opening the PR

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 87.61%. Comparing base (b8d4d69) to head (364616c).
⚠️ Report is 1 commits behind head on main.

Additional details and impacted files

@@             Coverage Diff              @@
##               main     #738      +/-   ##
============================================
+ Coverage     86.89%   87.61%   +0.72%     
- Complexity      970      975       +5     
============================================
  Files            45       45              
  Lines          3036     3036              
  Branches        381      381              
============================================
+ Hits           2638     2660      +22     
+ Misses          237      215      -22     
  Partials        161      161              

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