Drop adde-lint, use eslint directly for "lint:js" run-script

[bantic]

For the "lint:js" run script, drop the usage of the custom @addepar/ember-toolbox-supplied ember adde-lint command, replacing it with direct usage of eslint instead.

Technically speaking, this is broader lint coverage than we had before.
The adde-lint command (as in ember adde-lint) is defined at Addepar/addepar-ember-toolbox@897b838/index.js#L29-L44
For --javascript, the lint subcommand code concats the STANDARD_APP_FILES and STANDARD_APP_PATHS (defined here) and then filters out any that don't exist. It passes those as explicit args to the eslint command.

It seems more future-safe to lint using the catchall ..
In order to make linting work correctly I had to add dist/ to the .eslintignore file.
I used DEBUG=eslint:cli-engine npx eslint . (from stackoverflow, here: https://stackoverflow.com/questions/70284958/how-to-list-files-being-linted-by-eslint) to double-check which files are linted.