feat(*): Add default bot code

bot/action/discrete_act.py

@@ -0,0 +1,24 @@
+import numpy as np
+from rlgym_compat import GameState
+
+
+class DiscreteAction:
+    """
+    Simple discrete action space. All the analog actions have 3 bins by default: -1, 0 and 1.
+    """
+
+    def __init__(self, n_bins=3):
+        assert n_bins % 2 == 1, "n_bins must be an odd number"
+        self._n_bins = n_bins
+
+    def get_action_space(self):
+        raise NotImplementedError("We don't implement get_action_space to remove the gym dependency")
+
+    def parse_actions(self, actions: np.ndarray, state: GameState) -> np.ndarray:
+        actions = actions.reshape((-1, 8)).astype(dtype=np.float32)
+
+        # map all binned actions from {0, 1, 2 .. n_bins - 1} to {-1 .. 1}.
+        actions[..., :5] = actions[..., :5] / (self._n_bins // 2) - 1
+
+        return actions
+