Add kiloohm unit of measurement

[ree-gupta]

Add kiloohm (kΩ) to the unitOfMeasurement terminology for the NHP-EBRAINS dataset use case.

Closes #468

[ree-gupta]

Hi @Raphael-Gazzotti The contributing guidelines recommended creating an issue and then a PR so I did that. In general, do you recommend that I batch all the instances I need and will need into a single issue and corresponding PR?

[ree-gupta]

I didn't add a definition since the other derived units (megaohm, gigaohm) don't have one - only ohm does. Should I add one?

[Raphael-Gazzotti]

@ree-gupta Proceeding with batches of instances can be an option when they belong to the same type. That said, for reviewability, it’s generally preferable to split larger changes into multiple PRs when many instances are added or modified.

You can also add definitions where possible, we aim to have at least one definition for all controlled terms. The missing ones are mostly associated with older instances.