* web: update to ESLint 9
ESLint 9 has been out for awhile now, and all of the plug-ins that we use have caught up, so it is
time to bite the bullet and upgrade. This commit:
- upgrades to ESLint 9, and upgrades all associated plugins
- Replaces the `.eslintrc` and `.eslintignore` files with the new, "flat" configuration file,
"eslint.config.mjs".
- Places the previous "precommit" and "nightmare" rules in `./scripts/eslint.precommit.mjs` and
`./scripts/eslint.nightmare.mjs`, respectively
- Replaces the scripted wrappers for eslint (`eslint`, `eslint-precommit`) with a single executable
that takes the arguments `--precommit`, which applies a stricter set of rules, and `--nightmare`,
which applies an even more terrifyingly strict set of rules.
- Provides the scripted wrapper `./scripts/eslint.mjs` so that eslint can be run from `bun`, if one
so chooses.
- Fixes *all* of the lint `eslint.config.mjs` now finds, including removing all of the `eslint`
styling rules and overrides because Eslint now proudly leaves that entirely up to Prettier.
To shut Dependabot up about ESLint.
* Added explanation for no-console removal.
* web: did not need the old and unmaintained nightmare mode; it can be configured directly.
