Add conversation requests list

- Add routes to REST API for conversation requests
- Add websocket notification on new conversation requests. This is unreliable.
- Rename 'ColoredCallButton' as 'ColoredRoundButton' and move it to Buttons file for reuse
- Review logic to show conversation tabs
- Add useConversationDisplayNameShort for conversations' names in lists. Will need more work.
- Add hooks to help managing React Query's cache
- Use React Query to remove conversations and update the cache doing so.
- Add ContactService and ConversationService as a way to group reusable functions for the server. This is inspired by jami-android

Known bug: The server often freezes on getContactFromUri (in ContactService) when a new conversation request is received.

Change-Id: I46a60a401f09c3941c864afcdb2625b5fcfe054a
diff --git a/common/src/enums/websocket-message-type.ts b/common/src/enums/websocket-message-type.ts
index 37036b9..512c1dc 100644
--- a/common/src/enums/websocket-message-type.ts
+++ b/common/src/enums/websocket-message-type.ts
@@ -17,6 +17,7 @@
  */
 export enum WebSocketMessageType {
   ConversationMessage = 'conversation-message',
+  ConversationRequest = 'conversation-request',
   ConversationView = 'conversation-view',
   OnComposingStatusChanged = 'on-composing-status-changed', // Sent by server to indicate who is composing a message or not
   SetIsComposing = 'set-is-composing', // Sent by user to indicate whether they are composing a message or not