(core) Adding import from google drive to the home screen

Summary: Importing from google drive from home screen (also for anonymous users)

Test Plan: Browser tests

Reviewers: dsagal, paulfitz

Reviewed By: dsagal

Differential Revision: https://phab.getgrist.com/D2943

app/common/DocListAPI.ts

@@ -1,6 +1,5 @@
 import {ActionGroup} from 'app/common/ActionGroup';
 import {TableDataAction} from 'app/common/DocActions';
-import {LocalPlugin} from 'app/common/plugin';
 import {Role} from 'app/common/roles';
 import {StringUnion} from 'app/common/StringUnion';
 import {FullUser} from 'app/common/UserAPI';
@@ -43,7 +42,6 @@ export interface OpenLocalDocResult {
   clientId: string;  // the docFD is meaningful only in the context of this session
   doc: {[tableId: string]: TableDataAction};
   log: ActionGroup[];
-  plugins: LocalPlugin[];
   recoveryMode?: boolean;
   userOverride?: UserOverride;
 }

app/common/gristUrls.ts

@@ -2,6 +2,7 @@ import {BillingPage, BillingSubPage, BillingTask} from 'app/common/BillingAPI';
 import {OpenDocMode} from 'app/common/DocListAPI';
 import {encodeQueryParams, isAffirmative} from 'app/common/gutil';
 import {localhostRegex} from 'app/common/LoginState';
+import {LocalPlugin} from 'app/common/plugin';
 import {StringUnion} from 'app/common/StringUnion';
 import {Document} from 'app/common/UserAPI';
 import clone = require('lodash/clone');
@@ -442,6 +443,9 @@ export interface GristLoadConfig {
 
   // Google Client Id, used in Google integration (ex: Google Drive Plugin)
   googleClientId?: string;
+
+  // List of registered plugins (used by HomePluginManager and DocPluginManager)
+  plugins?: LocalPlugin[];
 }
 
 // Acceptable org subdomains are alphanumeric (hyphen also allowed) and of