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 :)

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

packages/twenty-server/src/engine/core-modules/user/user.resolver.ts

@@ -35,7 +35,6 @@ import { AuthWorkspace } from 'src/engine/decorators/auth/auth-workspace.decorat
 import { DemoEnvGuard } from 'src/engine/guards/demo.env.guard';
 import { WorkspaceAuthGuard } from 'src/engine/guards/workspace-auth.guard';
 import { streamToBuffer } from 'src/utils/stream-to-buffer';
-import { isDefined } from 'src/utils/is-defined';
 
 const getHMACKey = (email?: string, key?: string | null) => {
   if (!email || !key) return null;