Finalize README.md

[MarcusAronsson1]

User Story

As a SafeSweeper operator I want clear documentation on how the car works so that I know what to expect.

Acceptance criteria

• [x] Explains "What? Why? How?" about the project
• [x] Illustrates the hardware and software architecture with text and/or diagrams
• [x] Instructs how to set up and get started with the project

To Reproduce

Steps to reproduce the behavior:

• Go to the repositories first page
• Read the README

[MarcusAronsson1]

• Updated the list of hardware
• Updated the list of Android libraries