Documents: added complete v2.0.0 paper write-up

Since we now have everything ready, we can proceed to complete
the paper write-up. Hence, let's do this.

This patch adds the complete v2.0.0 paper write-up into
Documents/ directory.

Co-authored-by: Shuralyov, Jean <jeanshuralyov@gmail.com>
Co-authored-by: Galyna, Cory <cory.galyna@gmail.com>
Co-authored-by: 湘渝萱 <alice.xiang.yu.xuan@gmail.com>
Co-authored-by: (Holloway) Chew, Kean Ho <me@chewkeanho.com>
Reviewed-by: (Holloway) Chew, Kean Ho <me@chewkeanho.com>
Signed-off-by: (Holloway) Chew, Kean Ho <hello@chewkeanho.com>

Author: 4 people