[robotpy][examples] Split examples and snippets (#8944)

This also updates the bazel scripts to behave more like the C++ and Java
examples, and updates the copybara scripts to be able to sync up
`mostrobotpy`

robotpyExamples/examples/HatchbotTraditional/commands/defaultdrive.py

@@ -0,0 +1,27 @@
+#
+# Copyright (c) FIRST and other WPILib contributors.
+# Open Source Software; you can modify and/or share it under the terms of
+# the WPILib BSD license file in the root directory of this project.
+#
+
+import typing
+import commands2
+from subsystems.drivesubsystem import DriveSubsystem
+
+
+class DefaultDrive(commands2.Command):
+    def __init__(
+        self,
+        drive: DriveSubsystem,
+        forward: typing.Callable[[], float],
+        rotation: typing.Callable[[], float],
+    ) -> None:
+
+        self.drive = drive
+        self.forward = forward
+        self.rotation = rotation
+
+        self.addRequirements(self.drive)
+
+    def execute(self) -> None:
+        self.drive.arcadeDrive(self.forward(), self.rotation())