Switch to ESM

[alexdima]

re #160416

To run:

• run node migrate.js
• run yarn watch

---

To do:

• run from source
  • main process
  • renderer window
  • extension host process
  • extension host web worker
  • editor worker
  • output link computer
  • issue reporter window
  • process explorer window
  • shared process window
  • shared process web worker (enables search and file watching)
• run web from source
• run server from source
• run unit tests
  • node-based (mocha test/unit/node/index.mjs --delay --ui=tdd --timeout=5000 --exit --esm)
  • electron-based (./scripts/test.sh --esm)
  • browser-based (yarn test-browser --esm --browser chromium, only chromium because of importmap, likely needs an update of playwright)
• run integration tests
  • browser-based (./scripts/test-web-integration.sh --esm)
  • electron-based (./scripts/test-integration.sh --esm)
  • remote
• run smoke tests
• bundling
  • ASAR
  • nls

[bpasero]

The changes in this PR have been ported to main and we can now build with ESM from main using this build option:

Developing locally from main:

• node migrate.mjs
• yarn watch-esm
• scripts/code.sh

Tests:

• scripts/test-esm.sh
• yarn test-browser-esm
• yarn test-node-esm