This MR adds the path of the isaac lab extensions to vscode
`python.analysis.extraPaths` to execute intelligent prompt in vscode
properly.

Fixes #463

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

In  .vscode/tools/setup_vscode.py

![f9429980-bf0b-4e28-917b-10c0eccc92ce](https://github.com/isaac-sim/IsaacLab/assets/75050508/18cf4868-28be-4907-ae6e-be287ff946b1)

- [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
- [ ] I have added tests that prove my fix is effective or that my
feature works
- [x] I have run all the tests with `./isaaclab.sh --test` and they pass
- [ ] 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