fix: recently added items sort order in the homepage

.ie. stop relying on folder last mod date, and use the latest file from the folder

+ bump watchdog to v4
+ add WIP docs (stashed in .github/code.docs for now)

app/utils/customlist.py

@@ -0,0 +1,14 @@
+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
+        return super().__getitem__(index)
+
+    def __iter__(self) -> Iterator:
+        # Do some shared memory stuff here
+        return super().__iter__()