Better handle graphql commit errors (#343)

* Better handle graphql commit errors

* add graphql error test

src/Speckle.Sdk/Api/Exceptions.cs

@@ -126,3 +126,14 @@ public sealed class WorkspacePermissionException : SpeckleGraphQLException
   public WorkspacePermissionException(string? message, Exception? innerException)
     : base(message, innerException) { }
 }
+
+public sealed class CannotCreateCommitException : SpeckleGraphQLException
+{
+  public CannotCreateCommitException() { }
+
+  public CannotCreateCommitException(string? message)
+    : base(message) { }
+
+  public CannotCreateCommitException(string? message, Exception? innerException)
+    : base(message, innerException) { }
+}

src/Speckle.Sdk/Api/GraphQL/GraphQLErrorHandler.cs

@@ -33,6 +33,7 @@ internal static class GraphQLErrorHandler
         "BAD_USER_INPUT" => new SpeckleGraphQLBadInputException(message),
         "INTERNAL_SERVER_ERROR" => new SpeckleGraphQLInternalErrorException(message),
         "WORKSPACES_MODULE_DISABLED_ERROR" => new SpeckleGraphQLWorkspaceNotEnabledException(message),
+        "COMMIT_CREATE_ERROR" => new CannotCreateCommitException(message),
         _ => new SpeckleGraphQLException(message),
       };
       exceptions.Add(ex);

tests/Speckle.Sdk.Tests.Unit/Api/GraphQLErrorHandler.cs

@@ -23,6 +23,7 @@ public class GraphQLErrorHandlerTests
     ];
     yield return [typeof(SpeckleGraphQLException), new Map { { "foo", "bar" } }];
     yield return [typeof(SpeckleGraphQLException), new Map { { "code", "CUSTOM_THING" } }];
+    yield return [typeof(CannotCreateCommitException), new Map { { "code", "COMMIT_CREATE_ERROR" } }];
   }
 
   [Theory]