[BDGR-103] Convert desktop codebase and builds to ES Modules

[markspolakovs]

Fun drive-by: I think I've finally got to the bottom of why the Prisma client was getting bundled into the Desktop build (where it has no reason to end up and is effectively dead code): I needed to add "sideEffects": false to the utility/prisma/package.json. Added an eslint rule against importing @badger/prisma/client as an extra safeguard.

Fixes BDGR-103, #281.

[codecov-commenter]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 22.16%. Comparing base (e300a52) to head (a45af14).
Report is 4 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff            @@
##             main     #482    +/-   ##
========================================
  Coverage   22.16%   22.16%            
========================================
  Files          96       96            
  Lines        3614     3614            
  Branches      594      606    +12     
========================================
  Hits          801      801            
+ Misses       2812     2664   -148     
- Partials        1      149   +148     

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