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/engine/core-modules/environment/environment-variables.ts

@@ -201,6 +201,10 @@ export class EnvironmentVariables {
   @ValidateIf((env) => env.AUTH_MICROSOFT_ENABLED)
   AUTH_MICROSOFT_CALLBACK_URL: string;
 
+  @IsUrl({ require_tld: false })
+  @ValidateIf((env) => env.AUTH_MICROSOFT_ENABLED)
+  AUTH_MICROSOFT_APIS_CALLBACK_URL: string;
+
   @CastToBoolean()
   @IsOptional()
   @IsBoolean()