Add impact index fixture and filesystem artifact uploader

- Introduced a sample BOM index JSON file for impact index testing.
- Created unit tests for the impact index fixture to ensure proper loading of sample images.
- Implemented the FilesystemPackRunArtifactUploader class to handle artifact uploads to the local filesystem.
- Added comprehensive tests for the FilesystemPackRunArtifactUploader, covering file copying, missing files, and expression outputs.

src/__Libraries/StellaOps.Cryptography.Kms/GcpKmsFacade.cs

@@ -1,5 +1,6 @@
 using Google.Cloud.Kms.V1;
 using Google.Protobuf;
+using Google.Protobuf.WellKnownTypes;
 
 namespace StellaOps.Cryptography.Kms;