[Feature] Manual how to add shops

[manuelkamp]

I very much like this idea, but since that is onle based for north american stores, it is useless for me here in austria (where we buy from european stores). So I'd like to have a manual on how to integrate more stores, since I have a feeling this would help this project grow when there are more stores worldwide available.

[Cybrarist]

the problem is there's no one way to crawl all websites, if you check the code, sometimes i use xpath, other times i check website's javascript code where the data is passed as a string that is parsed later on, other times it's another url that i need to check to get the data.

so this is will be very complex for an open source project tbh, if you have store suggestions, then i can check and add them, otherwise feel free to do a PR with the store you like and i can merge the code for it