create machine-readable codes (wmo-im#243)

Merge pull request wmo-im#214 from wmo-im/FT2023-2

FT2023-2

generate machine-readable codes

Merge pull request wmo-im#185 from wmo-im/FT2023-1

FT2023-1 NFP review is complete

regenerate xml and txt files

Merge pull request wmo-im#186 from wmo-im/FT-updatesMinor

FT2023-2 minor updates

regenerate machine-readable codes

Merge pull request wmo-im#162 from wmo-im/FT2022-2

FT2022-2 merge to Master

Merge pull request wmo-im#152 from wmo-im/editorialUpdates

editorial only revisions based on LSPOU review

FT22-1 regenerate xml