[writer] module withe PickleWriter

fixtracks/utils/writer.py

@@ -0,0 +1,20 @@
+import pickle
+import logging
+from PySide6.QtCore import QRunnable, Slot
+
+from fixtracks.utils.signals import WriterSignals
+
+class PickleWriter(QRunnable):
+    signals = WriterSignals()
+
+    def __init__(self, data, file_path):
+        super().__init__()
+        self.data = data
+        self.file_path = file_path
+
+    @Slot()
+    def run(self):
+        self.data.save(self.file_path)
+        logging.info("Saving/pickling merged file to %s", self.file_path)
+        self.data.save(self.file_path)
+        self.signals.finished.emit(True)