[Improvements] Add support for creating app from YAML string config (#980)

tests/test_utils.py

@@ -1,6 +1,6 @@
 import yaml
 
-from embedchain.utils import validate_yaml_config
+from embedchain.utils import validate_config
 
 CONFIG_YAMLS = [
     "configs/anthropic.yaml",
@@ -30,7 +30,7 @@ def test_all_config_yamls():
         assert config is not None
 
         try:
-            validate_yaml_config(config)
+            validate_config(config)
         except Exception as e:
             print(f"Error in {config_yaml}: {e}")
             raise e