feat: collection name everywhere (#310)

Co-authored-by: cachho <admin@ch-webdev.com>

embedchain/vectordb/base_vector_db.py

@@ -3,7 +3,6 @@ class BaseVectorDB:
 
     def __init__(self):
         self.client = self._get_or_create_db()
-        self.collection = self._get_or_create_collection()
 
     def _get_or_create_db(self):
         """Get or create the database."""

embedchain/vectordb/chroma_db.py

@@ -39,9 +39,9 @@ class ChromaDB(BaseVectorDB):
         """Get or create the database."""
         return self.client
 
-    def _get_or_create_collection(self):
+    def _get_or_create_collection(self, name):
         """Get or create the collection."""
         return self.client.get_or_create_collection(
-            "embedchain_store",
+            name=name,
             embedding_function=self.embedding_fn,
         )