Add SWF Reverse Engineering Documentation to `/docs/` path in project

[glanham-jr]

1 - shooter
2 - plat
3 - algo
5- ppg
7 - arcade

[Sploder-Saptarshi]

Honestly speaking, there was never any documentation for me to begin with... It all just "comes" by experience and tinkering... I've made the SWFs into a mostly modifyable state and the Physics and Platformer SWFs into a fully modifyable state.