2880 timebox create a poc to fetch emails from the gmail api (#2993)

* create empty service

* getting threads is working

* insert message channel

* save threads in the db

* clean

* fetch messages

* create a service to fetch a batch of messages

* batch messages

* use httpService instead

* parse batch

* base 64 decoding working

* solve parsing bug

* saving messages is working

* bug to fix in fetchAllByBatches

* fetching all messages is working but not saving yet

* fecth 500 messages and threads is working

* remove unused package and console log

* set direction to incoming

* fix bug after merging main

packages/twenty-server/src/workspace/workspace-sync-metadata/standard-objects/message-channel.object-metadata.ts

@@ -25,7 +25,7 @@ import { MessageThreadObjectMetadata } from 'src/workspace/workspace-sync-metada
 @IsSystem()
 export class MessageChannelObjectMetadata extends BaseObjectMetadata {
   @FieldMetadata({
-    // This will be a type select later
+    // This will be a type select later: metadata, subject, share_everything
     type: FieldMetadataType.TEXT,
     label: 'Visibility',
     description: 'Visibility',