Add lucidia_memory/store.py with memory store stub

lucidia_llm/lucidia_memory/store.py

@@ -0,0 +1,14 @@
+"""Memory store for Lucidia: handles storing and retrieving embeddings."""
+
+
+class MemoryStore:
+    def __init__(self, storage_path):
+        self.storage_path = storage_path
+
+    def add(self, key, embedding):
+        """Add an embedding to the store."""
+        raise NotImplementedError("Memory add method not implemented")
+
+    def query(self, embedding, top_k=5):
+        """Query the store with an embedding."""
+        raise NotImplementedError("Memory query method not implemented")