* Add linter rules for import order and type member delimiters
* Remove unneeded group
* Group all app/* imports before the internal imports
* Move app/ imports before parent imports
* Separate @node_modules imports into a different group
* Substitute app paths by aliases
* Fix @node_modules import order and add test related modules
* Add aliases for types and test, and group import types
* update eslint's `comma-dangle` rule to `always-multiline`
* add check and fix scripts to package.json
* Invoke `yarn fix` to adopt the updated eslint rules. No other changes are included.
