modularize src

+ merge main.py and manage.py
+ move start logic to swingmusic/__main__.py
+ add a run.py on the project root

swingmusic/utils/customlist.py

@@ -0,0 +1,18 @@
+from typing import Iterator
+
+
+class CustomList(list):
+    # TODO: I think SharedMemoryList implementation will be done here.
+    # This list should be used as a normal list without any changes in the stores.
+
+    def __getitem__(self, index):
+        # Do some shared memory stuff here
+        # print the length of the list
+        # print(f"__getitem__ Length of the list: {len(self)}")
+        return super().__getitem__(index)
+
+    def __iter__(self) -> Iterator:
+        # Do some shared memory stuff here
+        # print the length of the list
+        # print(f"__iter__ Length of the list: {len(self)}")
+        return super().__iter__()