Updates docs for VS Code IntelliSense setup and JAX installation (#552)

# Description

This PR updates docs for:
* VS Code IntelliSense setup when installing Isaac Lab via pip
* Compatible JAX installation

## Type of change

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applicable. -->

- This change requires a documentation update

## Screenshots

<img width="871" height="467" alt="image"
src="https://github.com/user-attachments/assets/280a0e9b-70f2-4363-b93a-5ca6b12218cd"
/>


<img width="796" height="351" alt="image"
src="https://github.com/user-attachments/assets/3fda6c48-cf52-4690-a59b-5983556ed2f6"
/>


## 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
- [ ] 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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putting an x character in it

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- [x] I have done this task
- [ ] I have not done this task
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docs/source/overview/reinforcement-learning/rl_existing_scripts.rst

@@ -136,10 +136,13 @@ SKRL
 
          .. warning::
 
-            It is recommended to `install JAX <https://jax.readthedocs.io/en/latest/installation.html>`_ manually before proceeding to install skrl and its dependencies, as JAX installs its CPU version by default. For example, ``pip install -U "jax[cuda12]"`` can be used to install JAX for CUDA 12.
+            It is recommended to `install JAX <https://jax.readthedocs.io/en/latest/installation.html>`_ manually before proceeding to install skrl and its dependencies, as JAX installs its CPU version by default.
             Visit the **skrl** `installation <https://skrl.readthedocs.io/en/latest/intro/installation.html>`_ page for more details.
             Note that JAX GPU support is only available on Linux.
 
+            JAX 0.6.0 or higher (built on CuDNN v9.8) is incompatible with Isaac Lab's PyTorch 2.7 (built on CuDNN v9.7), and therefore not supported.
+            To install a compatible version of JAX for CUDA 12 use ``pip install "jax[cuda12]<0.6.0"``, for example.
+
          .. code:: bash
 
             # install python module (for skrl)

docs/source/setup/installation/isaaclab_pip_installation.rst

@@ -148,3 +148,18 @@ To run a user-defined script for Isaac Lab, simply run
 .. code:: bash
 
     python my_awesome_script.py
+
+Generating VS Code Settings
+~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+
+Due to the structure resulting from the installation, VS Code IntelliSense (code completion, parameter info and member lists, etc.) will not work by default.
+To set it up (define the search paths for import resolution, the path to the default Python interpreter, and other settings), for a given workspace folder, run the following command:
+
+    .. code-block:: bash
+
+        python -m isaaclab --generate-vscode-settings
+
+    .. warning::
+
+        The command will generate a ``.vscode/settings.json`` file in the workspace folder.
+        If the file already exists, it will be overwritten (a confirmation prompt will be shown first).