feat: implement connection micro service

libs/dtos/src/index.ts

libs/ledgers/src/idunion/idunion.provider.ts

libs/ledgers/src/index.ts

libs/ledgers/src/ledgers.service.spec.ts

libs/ledgers/src/ledgers.service.ts

libs/nats/src/base.nats.service.ts

libs/nats/src/consumer.nats.service.ts

libs/nats/src/index.d.ts

libs/nats/src/index.ts

libs/nats/src/nats.module.d.ts

libs/nats/src/producer.nats.service.ts

package.json

tsconfig.base.json

yarn.lock