doc: add AWS Architecture Center link to project idea

[tungbq]

Similar to Azure Architecture Center, this task is to add https://aws.amazon.com/architecture link to https://github.com/tungbq/devops-project/blob/main/planning/PROJECT_IDEA.md

[singhsayan]

Hi @tungbq ! I'd like to work on this issue. Please assign it to me.

[tungbq]

Thanks @singhsayan, I assigned it to you