Update Autoware Concept Page

[mitsudome-r]

Checklist

• I've read the contribution guidelines.
• I've searched other issues and no duplicate issues were found.
• I've agreed with the maintainers that I can plan this task.

Description

Update the "Goal" section of Autoware Concept page https://autowarefoundation.github.io/autoware-documentation/main/design/autoware-concepts/.

Purpose

We would like to add details for the Goal section of Autoware Concept page so that developers and users of Autoware would have better idea about the scope of Autoware in high level. This could also become guideline for the architecture design and implementation of the software.

Possible approaches

We do a review from software architects and iteratively update the document.

Definition of done

Goals of Autoware is clarified in the documentation.

[kenji-miyake]

TODO: Consider updating this part.
#139 (comment)

[stale]

This pull request has been automatically marked as stale because it has not had recent activity.