chore: use nx commands for some scripts

[david-luna]

Which problem is this PR solving?

leverage nx (which is used by lerna) and its cache

Short description of the changes

• replace lerna's commands with nx commands when possible
• add nx.json to setup task dependencies and build cache
• update unit test workflow to set the build cache for nx

Type of change

Please delete options that are not relevant.

• Chore

How Has This Been Tested?

Checklist:

• Check test workflow to se if build cache takes effect

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 93.26%. Comparing base (7ed67f9) to head (96e6ac5).

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #5066   +/-   ##
=======================================
  Coverage   93.26%   93.26%           
=======================================
  Files         317      317           
  Lines        8195     8195           
  Branches     1641     1641           
=======================================
  Hits         7643     7643           
  Misses        552      552           

[david-luna]

Using nx cache here impacts a lot in the CI and adapting to it would require consensus from maintainers. The dev experience may also be inpacted. I think it's best to have the discussion 1st before presenting a PR