rustBoot State diagram was added

[nihalpasham]

Some question and feedback:

• can we use bullet-lists rather bulleted-numbers?
• can we add a colour for each true or false description box?
• replace match with check(s) keyword and use a bullet-list for each check.
• change call to jump keyword
• I think we need to use different colours to indicate failures states or rollbacks.

[UdayakumarHidakal]

Review comments addressed.

[UdayakumarHidakal]

• Changes addressed.