Adding additional docs on sensors and ROS 2 usage

[SteveMacenski]

Summary

Adds some important documentation context and linking up of key information in tutorials. I wasn't sure how you handle version control since all the version are in the same branch, so I made the changes across the 3 current and future versions (and made sure for Fortress to use IGN instead of GZ in writing). If that's all automatically backported, let me know and I'll avoid that in the future.

Checklist

• [x] Signed all commits for DCO
• [x] Added tests
• [x] Updated documentation (as needed)
• [x] Updated migration guide (as needed)
• [x] Consider updating Python bindings (if the library has them)
• [x] codecheck passed (See contributing)
• [x] All tests passed (See test coverage)
• [ ] While waiting for a review on your PR, please help review another open pull request to support the maintainers

Note to maintainers: Remember to use Squash-Merge and edit the commit message to match the pull request summary while retaining Signed-off-by messages.

[mabelzhang]

For clarification - This is a feature / bug fix right? Could you please remove the "Forward port" and "Release" sections in the PR description?

I wasn't sure how you handle version control since all the version are in the same branch, so I made the changes across the 3 current and future versions

Yeah what you did is correct.

[mabelzhang]

Maybe @quarkytale is the most familiar with other relevant tutorials to review parts of this one? No obligations.

[SteveMacenski]

Any blockers to having this merged now? This feels like something that can go in easily once the instructions are validated over each distribution (thanks Mabel!)

[SteveMacenski]

@mabelzhang when does this go online?

[azeey]

I just ran the deployment. Should be up pretty soon.