Move CipherOperation into KeyOperation, refactor

- KeyOperation and Algorithm now encompasses encryption, decryption, wrapping, unwrapping, signing, and verifying.
- Removed elliptic curve implementation from JCA.qll pending rewrite
- Removed JCAAlgorithmInstance abstraction from JCA.qll
- Cleaned up and removed JCA-specific naming from Model.qll
- Added and clarified documentation

Author: nicolaswill

cpp/ql/lib/experimental/Quantum/Language.qll

@@ -112,7 +112,7 @@ module ArtifactUniversalFlowConfig implements DataFlow::ConfigSig {
 
 module ArtifactUniversalFlow = DataFlow::Global<ArtifactUniversalFlowConfig>;
 
-abstract class CipherOutputArtifact extends Crypto::CipherOutputArtifactInstance {
+abstract class CipherOutputArtifact extends Crypto::KeyOperationOutputArtifactInstance {
   override predicate flowsTo(Crypto::FlowAwareElement other) {
     ArtifactUniversalFlow::flow(this.getOutputNode(), other.getInputNode())
   }