feat: drop calendar repository (#5824)

This PR is replacing and removing all the raw queries and repositories
with the new `TwentyORM` and injection system using
`@InjectWorkspaceRepository`.
Some logic that was contained inside repositories has been moved to the
services.
In this PR we're only replacing repositories for calendar feature.

---------

Co-authored-by: Weiko <corentin@twenty.com>
Co-authored-by: bosiraphael <raphael.bosi@gmail.com>
Co-authored-by: Charles Bochet <charles@twenty.com>

packages/twenty-server/src/modules/api-key/standard-objects/api-key.workspace-entity.ts

@@ -45,5 +45,5 @@ export class ApiKeyWorkspaceEntity extends BaseWorkspaceEntity {
     icon: 'IconCalendar',
   })
   @WorkspaceIsNullable()
-  revokedAt?: Date;
+  revokedAt?: Date | null;
 }