docs: update docstrings (#565)

embedchain/config/vectordbs/BaseVectorDbConfig.py

@@ -7,11 +7,23 @@ class BaseVectorDbConfig(BaseConfig):
     def __init__(
         self,
         collection_name: Optional[str] = None,
-        dir: Optional[str] = None,
+        dir: str = "db",
         host: Optional[str] = None,
         port: Optional[str] = None,
     ):
+        """
+        Initializes a configuration class instance for the vector database.
+
+        :param collection_name: Default name for the collection, defaults to None
+        :type collection_name: Optional[str], optional
+        :param dir: Path to the database directory, where the database is stored, defaults to "db"
+        :type dir: str, optional
+        :param host: Database connection remote host. Use this if you run Embedchain as a client, defaults to None
+        :type host: Optional[str], optional
+        :param host: Database connection remote port. Use this if you run Embedchain as a client, defaults to None
+        :type port: Optional[str], optional
+        """
         self.collection_name = collection_name or "embedchain_store"
-        self.dir = dir or "db"
+        self.dir = dir
         self.host = host
         self.port = port