Run type check for all web app packages in CI (#22578)

* Fix incorrect usage of types pacakge

* Make platform packages properly expose their type definitions

* Have Boards, Channels, and Playbooks get types from platform packages properly

* Run type check for all web app packages in CI

* Fix incorrect job name

webapp/channels/src/components/integrations/add_command/add_command.tsx

@@ -4,8 +4,8 @@
 import React, {useState} from 'react';
 import {useHistory} from 'react-router-dom';
 
-import {Command} from '@mattermost/types/integrations.js';
-import {Team} from '@mattermost/types/teams.js';
+import {Command} from '@mattermost/types/integrations';
+import {Team} from '@mattermost/types/teams';
 
 import {ActionResult} from 'mattermost-redux/types/actions.js';
 

webapp/channels/src/components/integrations/add_oauth_app/add_oauth_app.tsx

@@ -4,8 +4,8 @@
 import React, {useState} from 'react';
 import {useHistory} from 'react-router-dom';
 
-import {OAuthApp} from '@mattermost/types/integrations.js';
-import {Team} from '@mattermost/types/teams.js';
+import {OAuthApp} from '@mattermost/types/integrations';
+import {Team} from '@mattermost/types/teams';
 
 import {ActionResult} from 'mattermost-redux/types/actions.js';
 

webapp/channels/src/components/integrations/integrations.tsx

@@ -4,7 +4,7 @@
 import React from 'react';
 import {FormattedMessage} from 'react-intl';
 
-import {Team} from '@mattermost/types/teams.js';
+import {Team} from '@mattermost/types/teams';
 
 import {Permissions} from 'mattermost-redux/constants';