Updates help text and docs to reflect pytest usage (#2638)

# Description

This updates the help output of the main script (isaaclab.sh/bat --help)
and the docs to reflect the switch from unittest to pytest for running
unit tests.

## Type of change

- This change requires a documentation update

## 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
- [N/A] 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

docs/source/refs/contributing.rst

@@ -416,7 +416,7 @@ We summarize the key points below:
 Unit Testing
 ^^^^^^^^^^^^
 
-We use `unittest <https://docs.python.org/3/library/unittest.html>`__ for unit testing.
+We use `pytest <https://docs.pytest.org>`__ for unit testing.
 Good tests not only cover the basic functionality of the code but also the edge cases.
 They should be able to catch regressions and ensure that the code is working as expected.
 Please make sure that you add tests for your changes.

docs/source/setup/installation/binaries_installation.rst

@@ -211,7 +211,7 @@ Clone the Isaac Lab repository into your workspace:
                -f, --format         Run pre-commit to format the code and check lints.
                -p, --python         Run the python executable provided by Isaac Sim or virtual environment (if active).
                -s, --sim            Run the simulator executable (isaac-sim.sh) provided by Isaac Sim.
-               -t, --test           Run all python unittest tests.
+               -t, --test           Run all python pytest tests.
                -o, --docker         Run the docker container helper script (docker/container.sh).
                -v, --vscode         Generate the VSCode settings file from template.
                -d, --docs           Build the documentation from source using sphinx.
@@ -233,7 +233,7 @@ Clone the Isaac Lab repository into your workspace:
                -f, --format         Run pre-commit to format the code and check lints.
                -p, --python         Run the python executable provided by Isaac Sim or virtual environment (if active).
                -s, --sim            Run the simulator executable (isaac-sim.bat) provided by Isaac Sim.
-               -t, --test           Run all python unittest tests.
+               -t, --test           Run all python pytest tests.
                -v, --vscode         Generate the VSCode settings file from template.
                -d, --docs           Build the documentation from source using sphinx.
                -n, --new            Create a new external project or internal task from template.

docs/source/setup/installation/pip_installation.rst

@@ -219,7 +219,7 @@ Clone the Isaac Lab repository into your workspace:
                -f, --format         Run pre-commit to format the code and check lints.
                -p, --python         Run the python executable provided by Isaac Sim or virtual environment (if active).
                -s, --sim            Run the simulator executable (isaac-sim.sh) provided by Isaac Sim.
-               -t, --test           Run all python unittest tests.
+               -t, --test           Run all python pytest tests.
                -o, --docker         Run the docker container helper script (docker/container.sh).
                -v, --vscode         Generate the VSCode settings file from template.
                -d, --docs           Build the documentation from source using sphinx.
@@ -241,7 +241,7 @@ Clone the Isaac Lab repository into your workspace:
                -f, --format         Run pre-commit to format the code and check lints.
                -p, --python         Run the python executable provided by Isaac Sim or virtual environment (if active).
                -s, --sim            Run the simulator executable (isaac-sim.bat) provided by Isaac Sim.
-               -t, --test           Run all python unittest tests.
+               -t, --test           Run all python pytest tests.
                -v, --vscode         Generate the VSCode settings file from template.
                -d, --docs           Build the documentation from source using sphinx.
                -n, --new            Create a new external project or internal task from template.

isaaclab.bat

@@ -241,7 +241,7 @@ echo     -i, --install [LIB]  Install the extensions inside Isaac Lab and learni
 echo     -f, --format         Run pre-commit to format the code and check lints.
 echo     -p, --python         Run the python executable (python.bat) provided by Isaac Sim.
 echo     -s, --sim            Run the simulator executable (isaac-sim.bat) provided by Isaac Sim.
-echo     -t, --test           Run all python unittest tests.
+echo     -t, --test           Run all python pytest tests.
 echo     -v, --vscode         Generate the VSCode settings file from template.
 echo     -d, --docs           Build the documentation from source using sphinx.
 echo     -n, --new            Create a new external project or internal task from template.

isaaclab.sh

@@ -247,7 +247,7 @@ print_help () {
     echo -e "\t-f, --format         Run pre-commit to format the code and check lints."
     echo -e "\t-p, --python         Run the python executable provided by Isaac Sim or virtual environment (if active)."
     echo -e "\t-s, --sim            Run the simulator executable (isaac-sim.sh) provided by Isaac Sim."
-    echo -e "\t-t, --test           Run all python unittest tests."
+    echo -e "\t-t, --test           Run all python pytest tests."
     echo -e "\t-o, --docker         Run the docker container helper script (docker/container.sh)."
     echo -e "\t-v, --vscode         Generate the VSCode settings file from template."
     echo -e "\t-d, --docs           Build the documentation from source using sphinx."