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/server/src/routers/default-moderators-router.ts b/server/src/routers/default-moderators-router.ts
index 06d79ca..90c6387 100644
--- a/server/src/routers/default-moderators-router.ts
+++ b/server/src/routers/default-moderators-router.ts
@@ -17,7 +17,7 @@
  */
 import { Router } from 'express';
 import asyncHandler from 'express-async-handler';
-import { HttpStatusCode } from 'jami-web-common';
+import { HttpStatusCode, IContact } from 'jami-web-common';
 import { Container } from 'typedi';
 
 import { Jamid } from '../jamid/jamid.js';
@@ -36,7 +36,7 @@
 
     // Add usernames for default moderators
     const defaultModeratorUris = jamid.getDefaultModeratorUris(accountId);
-    const namedDefaultModerators = [];
+    const namedDefaultModerators: IContact[] = [];
     for (const defaultModeratorUri of defaultModeratorUris) {
       const { username } = await jamid.lookupAddress(defaultModeratorUri, accountId);
       namedDefaultModerators.push({