feat: Share via WeChat

[jek-bao-choo]

https://www.wechat.com/en/ is the most popular messaging app in China (and also some parts of the world)

[Jordendarc]

was adding these share buttons to my app and saw wechat was missing, decided to look more into it and doesnt seem like there's an easy way to have something share to wechat like how fb/twitter/etc works
I checked out sharethis example here https://anitrendz.net/shuffle and it looks like the wechat share works like:

• mobile: prompt user to copy link and open up wechat
• desktop: open up qr code for user to scan (I dont understand why because the QR code just opens up the website, i guess the user downloads the qr code and shares to wechat?)

https://stackoverflow.com/a/56662663/10001008

[MurhafSousli]

I cannot find information about the sharer links for WeChat and its parameters, I will leave this to the community to contribute.

If you already have the required sharer URL, You can use it instantly, Follow this short guide https://github.com/MurhafSousli/ngx-sharebuttons/wiki/Custom-Share-Button