chore: add editorconfig to enforce private and public member naming convention

[daniel-pebble]

What this PR does / why we need it

This PR adds a editorconfig file which will enforce good naming convention when using support IDEs. Thankfully most private/public members already conform to this standard.
Private = _camalCase
Public = PascalCase

Which issue(s) this PR resolves / fixes

N/A

Please check the following list

• Does the affected code have corresponding tests, e.g. unit test, E2E test? No
• Does this change require a documentation update? No
• Does this introduce breaking changes that would require an announcement or bumping the major version? No
• Do all new files have an appropriate license header? No

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 80.48%. Comparing base (1f939a5) to head (65ac11b).
Report is 1 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main     #137   +/-   ##
=======================================
  Coverage   80.48%   80.48%           
=======================================
  Files          30       30           
  Lines         902      902           
  Branches      109      109           
=======================================
  Hits          726      726           
  Misses        122      122           
  Partials       54       54           

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[Wwwsylvia]

LGTM

[shizhMSFT]

LGTM