Add support for C++-26 reflection #967

Job	Run time
windows-msvc-shared (MSGPACK)	4m 11s
windows-msvc-shared (BOOST_SERIALIZATION)	7m 5s
windows-msvc-shared (PARQUET)	48m 39s
windows-msvc-shared (FLEXBUFFERS)	5m 39s
windows-msvc-shared (JSON)	15m 25s
windows-msvc (JSON)	14m 54s
windows-msvc (CAPNPROTO)	9m 16s
windows-msvc (CBOR)	11m 4s
windows-msvc-shared (CAPNPROTO)	8m 30s
windows-msvc-shared (TOML)	4m 7s
windows-msvc-shared (CBOR)	10m 22s
windows-msvc-shared (UBJSON)	7m 21s
windows-msvc (AVRO)	7m 20s
windows-msvc (BOOST_SERIALIZATION)	6m 58s
windows-msvc (UBJSON)	7m 52s
windows-msvc-shared (XML)	3m 24s
windows-msvc (FLEXBUFFERS)	6m 24s
windows-msvc (XML)	4m 20s
windows-msvc-shared (YAML)	4m 36s
windows-msvc (PARQUET)	44m 29s
windows-msvc (MSGPACK)	4m 10s
windows-msvc (TOML)	4m 10s
windows-msvc (CEREAL)	4m 20s
windows-msvc (YAML)	4m 41s
windows-msvc (benchmarks)	59m 17s
	5h 8m 34s

Navigation Menu