ci: Ensure that eslint runs on all frontend code (no-changelog) (#4602)

* ensure that eslint runs on all frontend code

* remove tslint from `design-system`

* enable prettier and eslint-prettier for `design-system`

* Delete tslint.json

* use a single editorconfig for the repo

* enable prettier for all code in `design-system`

* more linting fixes on design-system

* ignore coverage for git and prettier

* lintfix on editor-ui

.prettierignore

@@ -1,7 +1,6 @@
 dist
 packages/editor-ui
-packages/design-system
-package*.json
+package.json
 
 !packages/nodes-base/src
 !packages/nodes-base/test