chore: move common files to core-services (#33341)

_templates/service/new/service.ejs.t

ee/apps/account-service/src/service.ts

ee/apps/authorization-service/src/service.ts

ee/apps/ddp-streamer/src/service.ts

ee/apps/omnichannel-transcript/src/service.ts

ee/apps/presence-service/src/service.ts

ee/apps/queue-worker/src/service.ts

ee/apps/stream-hub-service/src/service.ts

packages/core-services/src/index.ts

packages/core-services/src/lib/mongo.ts