[enh] refactor GraphQL to separate files

back/webmin/graphql/test/hello.graphql

back/webmin/graphql/test/sycnhronize.graphql

back/webmin/graphql/test/ws2pInfos.graphql

back/webmin/queries/gql-current.ts

back/webmin/queries/gql-heads.ts

back/webmin/queries/gql-node-state.ts

back/webmin/queries/gql-synchronize.ts

back/webmin/queries/gql-ws2p.ts

back/webmin/schema.graphqls

back/webmin/shared/gql-network.ts

back/webmin/subscriptions/gql-events-blockchain.ts

back/webmin/subscriptions/gql-events-documents.ts

back/webmin/subscriptions/gql-events-sync-progress.ts

back/webmin/webmin.ts

common/dto.ts