oemetadata schema.json should be single source of truth for all open energy family software

[jh-RLI]

Harmonize oeplatform schema.json and oemetadata schema.json

oeplatform metaBuilder schema.json
...

[jh-RLI]

The challenge is to keep the schema.json usage harmonised due to some additional fields that are required, for example, in the metaBuilder feature of the OEP. There, the schema is used to render an HTML form that is used to create/edit the oemeta data. The schema used there is slightly different as some fields are read-only, some fields offer an auto-complete function and some fields are hidden.