Its a difficult balance as there are literally hundreds of Plugins! Where to start?
The documentation for all the official/community Plugins is available on the Capacitor website. It is no different regardless of the IDE, thus if Wappler were to document it, in essence, it would be a faxsilime of the official documentation.
Here is a demonstration of the code used previously for Cordova on how to integrate the camera plugin. It is pretty much the same implementation for including Plugins with Capacitor, to give you an idea (this is for Cordova not Capacitor)...