[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/RomiReference/commands/autonomoustime.py

@@ -0,0 +1,30 @@
+#
+# 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 commands2
+
+from commands.drivetime import DriveTime
+from commands.turntime import TurnTime
+from subsystems.drivetrain import Drivetrain
+
+
+class AutonomousTime(commands2.SequentialCommandGroup):
+    def __init__(self, drive: Drivetrain) -> None:
+        """Creates a new Autonomous Drive based on time. This will drive out for a period of time, turn
+        around for time (equivalent to time to turn around) and drive forward again. This should mimic
+        driving out, turning around and driving back.
+
+        :param drivetrain: The drive subsystem on which this command will run
+
+        """
+        super().__init__()
+
+        self.addCommands(
+            DriveTime(-0.6, 2.0, drive),
+            TurnTime(-0.5, 1.3, drive),
+            DriveTime(-0.6, 2.0, drive),
+            TurnTime(0.5, 1.3, drive),
+        )