ESLint rules have been added to enforce our JSDoc conventions. These
rules were introduced by updating `@metamask/eslint-config` to v9.
Some of the rules have been disabled because the effort to fix all lint
errors was too high. It might be easiest to enable these rules one
directory at a time, or one rule at a time.
Most of the changes in this PR were a result of running
`yarn lint:fix`. There were a handful of manual changes that seemed
obvious and simple to make. Anything beyond that and the rule was left
disabled.
* Support for Layer 2 networks with transaction fees on both layers
* Use variable name in transaction-breakdown
* Add comment on code source to ui/helpers/utils/optimism/fetchEstimatedL1Fee.js
* Fix unit tests
* Ensure values passed to are defined
* Fix activity log
