Add support for generating static webb to azure

[maer0216-star]

It would be nice if the plugin supported azure as target platform for a static webb. The static webb in azure should be generated from scratch from the scheduled jobb as well as updated whenever a change/add/delete occur on a block or page. I.e same functionality as for a static webb on disk. In azure the files should be stored in a blob storage container.

[7h3Rabbit]

We have now added two new events.

AfterIOWrite

Is called AFTER a file has been written to disk.
This is usefull to run code after folder has been updated.
For example an azcopy call.

AfterIODelete

Is called AFTER a file has been written to disk.
This is usefull to run code after folder has been updated.
For example an azcopy call.

Example use:

[7h3Rabbit]

You can read more about AzCopy here: https://docs.microsoft.com/en-us/azure/storage/common/storage-use-azcopy-blobs-synchronize

[7h3Rabbit]

I used "Get Shared Access Signature" option on my blob container when using Microsoft Azure Storage Explorer.
This way I got the required to use in the above example and made it easy to define how long access should be vaild and also what it should be valid for.