added package namespacing

src/app.py

@@ -11,9 +11,9 @@ from langchain.prompts.chat import (ChatPromptTemplate,
                                     HumanMessagePromptTemplate,
                                     SystemMessagePromptTemplate)
 
-from .core.chunking import chunk_file
-from .core.embedding import embed_files
-from .core.parsing import read_file
+from src.core.chunking import chunk_file
+from src.core.embedding import embed_files
+from src.core.parsing import read_file
 
 VECTOR_STORE = "faiss"
 MODEL = "openai"