refactor: Add config for init, app and query (#158)

embedchain/config/InitConfig.py

@@ -0,0 +1,36 @@
+import os
+
+from embedchain.config.BaseConfig import BaseConfig
+
+class InitConfig(BaseConfig):
+    """
+    Config to initialize an embedchain `App` instance.
+    """
+    def __init__(self, ef=None, db=None):
+        """
+        :param ef: Optional. Embedding function to use.
+        :param db: Optional. (Vector) database to use for embeddings.
+        """
+        # Embedding Function
+        if ef is None:
+            from chromadb.utils import embedding_functions
+            self.ef = embedding_functions.OpenAIEmbeddingFunction(
+                api_key=os.getenv("OPENAI_API_KEY"),
+                organization_id=os.getenv("OPENAI_ORGANIZATION"),
+                model_name="text-embedding-ada-002"
+            )
+        else:
+            self.ef = ef
+
+        if db is None:
+            from embedchain.vectordb.chroma_db import ChromaDB
+            self.db = ChromaDB(ef=self.ef)
+        else:
+            self.db = db
+
+        return
+
+
+    def _set_embedding_function(self, ef):
+        self.ef = ef
+        return