Create new interfaces for objects transmitted using the REST API

Changes:
- Create new IContact, IAccount, and IConversation interfaces in common/
    - These interfaces represent the serialized versions of the models which are transferred
    - The client models are classes which implement these interfaces
- Create new LookupResult interface for nameserver lookup results
- Create new IConversationMember interface for conversation members
    - The client interface ConversationMember extends this interface to have a Contact field rather than IContact
- Create new ConversationInfos interface for conversation infos
- Create new ContactDetails interface for contact details (used by contacts routes)
- Move request and response body interfaces into common/
- Merge AccountConfig into AccountDetails interface
- Create interfaces for server-only objects:
    - ConversationMemberInfos
    - ConversationRequestMetadata
- Ensure interfaces in jami-signal-interfaces.ts do not contain fields with JamiSwig types
- Rename models/ filenames to camelCase as they are not components
- Rewrite client models to have proper TypeScript accessors and remove unused getters
- Rewrite how client models are initialized from the serialized interface using .fromInterface static methods
- Make client models implement the interfaces in common/ for consistency
- Remove unneeded _next parameter for Express.js route handlers
- Use Partial<T> for all Express.js request body types on server
- Type all Axios response body types with interfaces

GitLab: #92
Change-Id: I4b2c75ac632ec5d9bf12a874a5ba04467c76fa6d
diff --git a/client/src/components/ConversationList.tsx b/client/src/components/ConversationList.tsx
index 6b03224..08553b7 100644
--- a/client/src/components/ConversationList.tsx
+++ b/client/src/components/ConversationList.tsx
@@ -22,7 +22,7 @@
 import { useContext, useEffect } from 'react';
 
 import { MessengerContext } from '../contexts/MessengerProvider';
-import { Conversation } from '../models/Conversation';
+import { Conversation } from '../models/conversation';
 import { useAppSelector } from '../redux/hooks';
 import ConversationListItem from './ConversationListItem';
 
@@ -48,7 +48,7 @@
           </div>
         )}
         {conversations.map((conversation) => (
-          <ConversationListItem key={conversation.getId()} conversation={conversation} />
+          <ConversationListItem key={conversation.id} conversation={conversation} />
         ))}
         {conversations.length === 0 && (
           <div className="list-placeholder">