feat: Merge Data Source (#3788)

Add the ability to merge two different series queries to generate a complete study query result.  Provides basic support for other types of merges, but those aren't yet added as full features.

extensions/default/src/getDataSourcesModule.js

@@ -6,6 +6,7 @@ import { createDicomWebApi } from './DicomWebDataSource/index.js';
 import { createDicomJSONApi } from './DicomJSONDataSource/index.js';
 import { createDicomLocalApi } from './DicomLocalDataSource/index.js';
 import { createDicomWebProxyApi } from './DicomWebProxyDataSource/index.js';
+import { createMergeDataSourceApi } from './MergeDataSource/index';
 
 /**
  *
@@ -32,6 +33,11 @@ function getDataSourcesModule() {
       type: 'localApi',
       createDataSource: createDicomLocalApi,
     },
+    {
+      name: 'merge',
+      type: 'mergeApi',
+      createDataSource: createMergeDataSourceApi,
+    },
   ];
 }