Default directional keys to WASD

[nickfloyd]

We want to default the up, left, down, and right movement keys to the more common WASD until a more extensible configuration solution can be built.

US: AS a DEV I NEED the games that I build on top of skipngo to use the default directional key mappings of WASD SO THAT I can have a more common default to character movement in my games.

Acceptance Criteria:

• [x] When pressing W the character moves up
• [x] When pressing A the character moves left
• [x] When pressing S the character moves down
• [x] When pressing D the character moves right
• [x] When pressing up arrow the character moves up
• [x] When pressing left arrow the character moves left
• [x] When pressing down arrow the character moves down
• [x] When pressing right arrow the character moves right

NOTES:

• We had some discussion around some configuration approaches that would work well but those will be a future concern.