Fixes test_selection_strategy.py unit test (#226)

# Description

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The `test_selection_strategy.py` unit test throws `ModuleNotFoundError:
No module named 'isaacsim.core'` error.
Fixing it by starting omniverse app to import needed dependencies.

## Type of change

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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`
- [ ] I have made corresponding changes to the documentation
- [x] My changes generate no new warnings
- [x] 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
- [x] I have added my name to the `CONTRIBUTORS.md` or my name already
exists there

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source/isaaclab_mimic/config/extension.toml

 [package]
 
 # Semantic Versioning is used: https://semver.org/
-version = "1.0.1"
+version = "1.0.2"
 
 # Description
 category = "isaaclab"

source/isaaclab_mimic/docs/CHANGELOG.rst

 Changelog
 ---------
 
+1.0.2 (2025-01-10)
+~~~~~~~~~~~~~~~~~~
+
+Fixed
+^^^^^^^
+
+* Fixed test_selection_strategy.py test case by starting omniverse app to import needed dependencies.
+
+
 1.0.1 (2024-12-16)
 ~~~~~~~~~~~~~~~~~~
 

source/isaaclab_mimic/test/test_selection_strategy.py

@@ -3,6 +3,11 @@
 #
 # SPDX-License-Identifier: Apache-2.0
 
+from isaaclab.app import AppLauncher
+
+# launch omniverse app
+simulation_app = AppLauncher(headless=True).app
+
 import numpy as np
 import torch
 import unittest