refactor: converted to new plugin structure

bec_plugins/scan_server/scan_plugins/scan_plugin_template.py

@@ -0,0 +1,32 @@
+"""
+SCAN PLUGINS
+
+All new scans should be derived from ScanBase. ScanBase provides various methods that can be customized and overriden
+but they are executed in a specific order:
+
+- self.initialize                        # initialize the class if needed
+- self.read_scan_motors                  # used to retrieve the start position (and the relative position shift if needed)
+- self.prepare_positions                 # prepare the positions for the scan. The preparation is split into multiple sub fuctions:
+    - self._calculate_positions          # calculate the positions
+    - self._set_positions_offset         # apply the previously retrieved scan position shift (if needed)
+    - self._check_limits                 # tests to ensure the limits won't be reached
+- self.open_scan                         # send an open_scan message including the scan name, the number of points and the scan motor names
+- self.stage                             # stage all devices for the upcoming acquisiton
+- self.run_baseline_readings             # read all devices to get a baseline for the upcoming scan
+- self.pre_scan                          # perform additional actions before the scan starts
+- self.scan_core                         # run a loop over all position
+    - self._at_each_point(ind, pos)      # called at each position with the current index and the target positions as arguments
+- self.finalize                          # clean up the scan, e.g. move back to the start position; wait everything to finish
+- self.unstage                           # unstage all devices that have been staged before
+- self.cleanup                           # send a close scan message and perform additional cleanups if needed
+"""
+
+# import time
+
+# import numpy as np
+
+# from bec_lib import MessageEndpoints, bec_logger, messages
+# from scan_server.errors import ScanAbortion
+# from scan_server.scans import FlyScanBase, RequestBase, ScanArgType, ScanBase
+
+# logger = bec_logger.logger