Remove transaction constructor from the public interface

examples/ts/assets/proto_sign_transaction.example.html

examples/ts/assets/proto_validate_api_response.example.html

npm.ts.md

wasm/__tests__/assets/data.encryption-operations.ts

wasm/__tests__/detailed/custom_jsons.ts

wasm/__tests__/detailed/formatters.ts

wasm/__tests__/detailed/hive_base.ts

wasm/__tests__/detailed/hive_chain.ts

wasm/__tests__/detailed/hive_chain_custom_opts.ts

wasm/__tests__/detailed/operation_factories.ts

wasm/__tests__/detailed/protocol_benchmarks.ts

wasm/__tests__/detailed/regression_hive_operations.ts

wasm/lib/detailed/base_api.ts

wasm/lib/detailed/chain_api.ts

wasm/lib/detailed/formatters/default_formatters.ts

wasm/lib/detailed/formatters/types.ts

wasm/lib/interfaces.ts