Clean up the project

[Daenara]

Hello,
I started playing around with this project last week because it is the best barcode scanner plugin I could find but doesn't quite fit what we need. Doing that I noticed that there are tons of things in there that are useful for you but problematic for everyone else. Examples of that are your eslint configurations as well as the npm files that make it impossible to even install packages without being logged in (most likely it even requires your account). Could you please clean up the repository so that it works out of the box when forked instead of requiring an hour of work?