# Description

Adds the class `AppLauncher` which takes configuration arguments to the
Isaac Sim `SimulationApp` and several environment variables. It launches
the SimulationApp and corresponding extensions in a controlled manner
allowing users to decide between different remote deployments, ROS
bridges, and viewport rendering.

AppLauncher can then be queried for logic on other SimulationApp
operations e.g. whether or not `SimulationContext.step()` should render
or not based on the resolved flags `AppLauncher.VIEWPORT` and
`AppLauncher.RENDER`.

Fixes #32 

## Type of change

- New feature (non-breaking change which adds functionality)
- This change requires a documentation update

## Checklist

- [x] I have run the [`pre-commit` checks](https://pre-commit.com/) with
`./orbit.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

---------
Co-authored-by: Farbod Farshidian <ffarshidian@theaiinstitute.com>
Co-authored-by: Mayank Mittal <mittalma@leggedrobotics.com>