Add BunnyStorage Adapter

[tacman]

It looks like there's a BunnyStorage adapter available at

https://github.com/PlatformCommunity/flysystem-bunnycdn

Can this be added to the list of Cloud Providers? Is there reason in particular it wouldn't work with the bundle?

Thx.

[maxhelias]

No particular difficulties in integrating this adapter.

But to go further, it would be more interesting to rework how adapters are managed, in order to offer third-party packages the possibility of plugging themselves into the bundle.