Create an auxiliary file provider for azure storage #26
Description
- create a new project WopiHost.AzureStorageProvider
- create a test project for it
- implement https://github.com/petrsvihlik/WopiHost/blob/master/src/WopiHost.Abstractions/IWopiStorageProvider.cs and related interfaces (similarly to WopiFileSystemProvider.cs)
- use azure sdk for it https://learn.microsoft.com/en-us/dotnet/api/overview/azure/storage?view=azure-dotnet