Separate common interfaces from client-specific classes

Changes:
- Move client-specific classes to client/src/models
- Extract common interface to standalone files in common/interfaces
- Remove unused features from client-specific classes
    - These are features which were once used on the old server, but are now no longer needed
    - Remove getObject() method for Account, Contact, and Conversation
    - Remove lookups, registrationState and registeringName from Account
    - Remove resolving logic from Contact
    - Remove requests and listeners from Conversation (once used for Socket.IO and promises on server)
- Rename services/Conversation.ts to services/conversationQueries.ts
- Update imports

Future work:
- Create interface versions of Account, Contact, and Conversation
- Create new interfaces to replace Records on server

GitLab: #94
Change-Id: Ia51fe6ebeda44a30887d851a5564569dc290e5ed
diff --git a/client/src/contexts/ConversationProvider.tsx b/client/src/contexts/ConversationProvider.tsx
index 7d09881..25137c0 100644
--- a/client/src/contexts/ConversationProvider.tsx
+++ b/client/src/contexts/ConversationProvider.tsx
@@ -15,13 +15,14 @@
  * License along with this program.  If not, see
  * <https://www.gnu.org/licenses/>.
  */
-import { Conversation, ConversationView, WebSocketMessageType } from 'jami-web-common';
+import { ConversationView, WebSocketMessageType } from 'jami-web-common';
 import { createContext, useContext, useEffect, useState } from 'react';
 
 import LoadingPage from '../components/Loading';
 import { useUrlParams } from '../hooks/useUrlParams';
+import { Conversation } from '../models/Conversation';
 import { ConversationRouteParams } from '../router';
-import { useConversationQuery } from '../services/Conversation';
+import { useConversationQuery } from '../services/conversationQueries';
 import { WithChildren } from '../utils/utils';
 import { useAuthContext } from './AuthProvider';
 import { WebSocketContext } from './WebSocketProvider';