Adding PlayerMovement class to interpolate/extrapolate position along tests (installing Jasmine)

front/src/Phaser/Game/PlayersPositionInterpolator.ts

@@ -0,0 +1,7 @@
+/**
+ * This class is in charge of computing the position of all players.
+ * Player movement is delayed by 200ms so position depends on ticks.
+ */
+export class PlayersPositionInterpolator {
+
+}