Added support for acknowledging code of conduct for using public Notebook Gallery (#117)

* minro code edits

* Added support for acknowledging code of conduct

- Added CodeOfConduct component that shows links and a checkbox that must be acknwledged before seeing the public galley
- Added verbose message for notebook publish error (when another notebook with the same name exists in the gallery)
- Added a feature flag for enabling code of conduct acknowledgement

* Added Info Component

* minor edit

* fixed failign tests

* publish tab displayed only when code of conduct accepted

* added code of conduct fetch during publish

* fixed bug

* added test and addressed PR comments

* changed line endings

* added comment

* addressed PR comments

src/Explorer/Notebook/NotebookManager.ts

@@ -108,13 +108,21 @@ export default class NotebookManager {
     this.junoClient.getPinnedRepos(this.gitHubOAuthService.getTokenObservable()()?.scope);
   }
 
-  public openPublishNotebookPane(
+  public async openPublishNotebookPane(
     name: string,
     content: string | ImmutableNotebook,
     parentDomElement: HTMLElement,
+    isCodeOfConductEnabled: boolean,
     isLinkInjectionEnabled: boolean
-  ): void {
-    this.publishNotebookPaneAdapter.open(name, getFullName(), content, parentDomElement, isLinkInjectionEnabled);
+  ): Promise<void> {
+    await this.publishNotebookPaneAdapter.open(
+      name,
+      getFullName(),
+      content,
+      parentDomElement,
+      isCodeOfConductEnabled,
+      isLinkInjectionEnabled
+    );
   }
 
   // Octokit's error handler uses any