chore(examples): lint examples/express using shared top-level eslint config

[trentm]

Refs: #2891

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 89.76%. Comparing base (2819660) to head (e65363a).
Report is 1 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #2894   +/-   ##
=======================================
  Coverage   89.76%   89.76%           
=======================================
  Files         187      187           
  Lines        9149     9149           
  Branches     1885     1885           
=======================================
  Hits         8213     8213           
  Misses        936      936           

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