Control aloha robot natively (#316)

Co-authored-by: Simon Alibert <75076266+aliberts@users.noreply.github.com>

lerobot/__init__.py

@@ -27,6 +27,7 @@ Example:
         print(lerobot.available_real_world_datasets)
         print(lerobot.available_policies)
         print(lerobot.available_policies_per_env)
+        print(lerobot.available_robots)
     ```
 
 When implementing a new dataset loadable with LeRobotDataset follow these steps:
@@ -182,7 +183,7 @@ available_datasets = list(
     itertools.chain(*available_datasets_per_env.values(), available_real_world_datasets)
 )
 
-# lists all available policies from `lerobot/common/policies` by their class attribute: `name`.
+# lists all available policies from `lerobot/common/policies`
 available_policies = [
     "act",
     "diffusion",
@@ -190,6 +191,13 @@ available_policies = [
     "vqbet",
 ]
 
+# lists all available robots from `lerobot/common/robot_devices/robots`
+available_robots = [
+    "koch",
+    "koch_bimanual",
+    "aloha",
+]
+
 # keys and values refer to yaml files
 available_policies_per_env = {
     "aloha": ["act"],