Establish linkml model for the inventory and establish "full ecosystem of CP7 Metadata tools"

[yarikoptic]

Would address

• GUI for adding new resource #15

since would allow for interfaces like

https://pool.psychoinformatics.de/ui/

with dump of data in some human accessible/editable YAML or JSON if desired.

See @jsheunis recent presentation at distribits 2025: (cut video is coming):

https://www.youtube.com/live/TMRGHBH77do?si=XRriTSU4jdaedWTh&t=11498

attn @candleindark who knows linkml and was tasked to look in all the wonderful work done by CP7 DataLad folks (@mih @jsheunis). This repo/project might be a nice "small" sized independent project to try that work on.