[IDC-1939] Debug Dialog part 1 (#2011)

* WIP debug dialog

* Rename the p10 downloader extension to debugger extension, add button to toolbar. Deactivate it by default.

* Fix unit tests

extensions/debugging/src/index.js

@@ -0,0 +1,50 @@
+import { getDicomWebClientFromConfig } from './utils';
+import { getCommands } from './commandsModule';
+import { version } from '../package.json';
+import toolbarModule from './toolbarModule';
+
+/**
+ * Constants
+ */
+
+/**
+ * Globals
+ */
+
+const sharedContext = {
+  dicomWebClient: null,
+};
+
+/**
+ * Extension
+ */
+export default {
+  /**
+   * Only required property. Should be a unique value across all extensions.
+   */
+  id: 'dicom-p10-downloader',
+  version,
+
+  /**
+   * LIFECYCLE HOOKS
+   */
+
+  preRegistration({ appConfig }) {
+    const dicomWebClient = getDicomWebClientFromConfig(appConfig);
+    if (dicomWebClient) {
+      sharedContext.dicomWebClient = dicomWebClient;
+    }
+  },
+
+  /**
+   * MODULE GETTERS
+   */
+
+  getCommandsModule({ servicesManager, extensionManager }) {
+    return getCommands(sharedContext, servicesManager, extensionManager);
+  },
+
+  getToolbarModule() {
+    return toolbarModule;
+  },
+};