Write about history of NWB/HDMF and scientific array-based data standards

[rly]

@rly will write about history and current state of nwb-schema-language and nwb, the state of arrays from the scientific data standards side. how the "stack" of data standards typically work, the link between schema, code, and serialization (#2 (comment))

Drafting here: https://docs.google.com/document/d/1BYri-0qzZ6VoHC7Osrc3emHRxLRGELcPTwtmy5WSjAk/edit?tab=t.0

Deadline: Next Arrays WG meeting on April 17