o365 calendar sync (#8044)

Implemented:

* Account Connect
* Calendar sync via delta ids then requesting single events


I think I would split the messaging part into a second pr - that's a
step more complex then the calendar :)

---------

Co-authored-by: bosiraphael <raphael.bosi@gmail.com>

packages/twenty-server/src/database/typeorm-seeds/core/feature-flags.ts

@@ -75,6 +75,11 @@ export const seedFeatureFlags = async (
         workspaceId: workspaceId,
         value: false,
       },
+      {
+        key: FeatureFlagKey.IsMicrosoftSyncEnabled,
+        workspaceId: workspaceId,
+        value: true,
+      },
       {
         key: FeatureFlagKey.IsAdvancedFiltersEnabled,
         workspaceId: workspaceId,