Prepare release v1.70.0

[joe-elliott]

Updates the changelog and package.json for v1.70.0

[graphite-app]

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[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 97.56%. Comparing base (cfd0b28) to head (1dfd6f3).
Report is 1 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #2876   +/-   ##
=======================================
  Coverage   97.56%   97.56%           
=======================================
  Files         256      256           
  Lines        7973     7973           
  Branches     2084     2084           
=======================================
  Hits         7779     7779           
  Misses        194      194           

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