[feature] Add 2D temporary support for NDSL's BoolFieldIJ

[FlorianDeconinck]

Description

Forgot booleans in #280. Booleans good. Have some booleans.

How has this been tested?

Update to unit test.

Checklist

• My code follows the style guidelines of this project
• I have performed a self-review of my own code
• I have commented my code, particularly in hard-to-understand areas
• I have made corresponding changes to the documentation (e.g. add new modules to docs/docstrings/)
• My changes generate no new warnings
• Any dependent changes have been merged and published in downstream modules
• New check tests, if applicable, are included

[twicki]

How simple this system is if +5 can eneable a full type 🤩

[romanc]

🚀