ENH: Add to_rms()/from_rms() methods in NestedHybridGrid

[tnatt]

Resolves #468

PR that simplifies the initialization of the NestedHybridGrid in RMS, by allowing users to enter names of objects inside RMS instead of xtgeo objects. It also enables easy writing of the grid and all of it's appended properties to RMS.

Checklist

• Tests added (if not, comment why)
• Test coverage equal or up from main (run pytest with --cov=src/ --cov-report term-missing)
• If not squash merging, every commit passes tests
• Appropriate commit prefix and precise commit message used
• All debug prints and unnecessary comments removed
• Docstrings are correct and updated
• Documentation is updated, if necessary
• Latest main rebased/merged into branch
• Added comments on this PR where appropriate to help reviewers
• Moved issue status on project board
• Checked the boxes in this checklist ✅

[alifbe]

_make_box_grid_with_region by default create region with id = 2, which means the test below should not create any nested grid. But since the assertion is only checking mock call counts/arguments, this didn't get caught.

[tnatt]

the _make_box_grid_with_region creates a region property where half the values are 1 and half the values are 2... so we are creating a nested grid - just refining the other half than what the target_region_id is saying .. a bit confusing 😄 so will make it more clear and add more test that we do refine the area that has value 1

[alifbe]

The new class is expecting region value = 1 for nested hybrid grid but the coarse grid is created with region value = 2. But none of the test capture this bug.

Suggest to change test strategy to check if nested grid is created.

[tnatt]

The new class is expecting region value = 1 for nested hybrid grid but the coarse grid is created with region value = 2. But none of the test capture this bug.

Suggest to change test strategy to check if nested grid is created.

Good catch 👀 will update!

[tnatt]

Have a look again @alifbe, I added more checks regarding the actual output itself - not just if expected calls are being made

[alifbe]

Not related, but this should be list[xtgeo.GridProperty] right?

[tnatt]

yup! will fix it while here

[alifbe]

This looks great 💯

Just spot something unrelated to this PR. Not sure if it can be part of this PR or another PR.