[Feature] Player's Run State

[rluders]

We need to implement the Player's move state to be used in our StateMachine. It is already partially implemented, but need to be changed, tested and polished. Right now the player needs to use the A and D key to move, backward and forwards.

Describe the solution you'd like

• The user doesn't need to hold key to the character runs;
• The character will be always moving forward (to the right);

Additional context It's important to identify the state transitions to this state.

[RoddieKieley]

Taking a look I see that there was an update in the air-state branch via commit d4dc1e05f5571e6659eb14e5eb6f6a413da55fad that enabled auto-running but he immediately auto-runs off the limit. Going to create a branch for endless running, #3, and test from there.

[RoddieKieley]

Endless running was implemented shortly after the above comment but just now closing the loop.