Integrate Beluga, Nav2 and TurtleBot 3

[Alondruck]

Proposed changes

Related to Ekumen-OS/beluga#307. The idea is to create a package with all the necessary files to launch a simulation using Beluga and Nav2 on the TurtleBot 3.

Type of change

• [ ] 🐛 Bugfix (change which fixes an issue)
• [x] 🚀 Feature (change which adds functionality)
• [ ] 📚 Documentation (change which fixes or extends documentation)

Checklist

• [ ] Lint and unit tests (if any) pass locally with my changes
• [ ] I have added tests that prove my fix is effective or that my feature works
• [ ] I have added necessary documentation (if appropriate)
• [x] All commits have been signed for DCO

Additional comments

This PR depends on issue #6 being resolved.

[Alondruck]

@hidmic I modified the environment variable in the launch file and I tested it installing beluga and nav2 from binaries in my computer and it works fine!