Script to convert LinkML to SHACL

[elichad]

Write script to convert that LinkML to SHACL and put the SHACL in the right place in the folder structure.

• in particular, figure out how to handle severity during this conversion, as currently severity is represented in the folder structure
• it may be better to support SHACL severity directly

Use the LinkML SHACL generator, but some pre- or post-processing will be needed.

[elichad]

This task is simplified by rocrate-validator now supporting SHACL severity directly

[elichad]

Probably not necessary as I'm using the LinkML SHACL converter already.