Fixes missing visible attribute in spawn_ground_plane (#3304)

# Description

`GroundPlaneCfg` allows for specifying `visible` parameter, but this
would not being parsed in `spawn_ground_plane`, resulting in the
parameter being a no-op when specified. This change adds a fix to parse
the `visible` parameter from the cfg and sets the visibility attribute
for the ground plane cfg appropriately.

Fixes #3263 

<!-- As a practice, it is recommended to open an issue to have
discussions on the proposed pull request.
This makes it easier for the community to keep track of what is being
developed or added, and if a given feature
is demanded by more than one party. -->

## Type of change

<!-- As you go through the list, delete the ones that are not
applicable. -->

- Bug fix (non-breaking change which fixes an issue)

## Checklist

- [x] I have run the [`pre-commit` checks](https://pre-commit.com/) with
`./isaaclab.sh --format`
- [x] I have made corresponding changes to the documentation
- [x] My changes generate no new warnings
- [ ] I have added tests that prove my fix is effective or that my
feature works
- [x] I have updated the changelog and the corresponding version in the
extension's `config/extension.toml` file
- [ ] I have added my name to the `CONTRIBUTORS.md` or my name already
exists there

<!--
As you go through the checklist above, you can mark something as done by
putting an x character in it

For example,
- [x] I have done this task
- [ ] I have not done this task
-->

source/isaaclab/isaaclab/sim/spawners/from_files/from_files.py

@@ -217,6 +217,10 @@ def spawn_ground_plane(
             # create semantic type and data attributes
             sem.CreateSemanticTypeAttr().Set(semantic_type)
             sem.CreateSemanticDataAttr().Set(semantic_value)
+
+    # Apply visibility
+    prim_utils.set_prim_visibility(prim, cfg.visible)
+
     # return the prim
     return prim