Refactor code structure for improved readability and maintainability

pyproject.toml

@@ -3,24 +3,31 @@ name = "studies"
 version = "0.1.0"
 description = "A curated collection of mathematics and data science projects developed during my academic journey."
 readme = "README.md"
-requires-python = ">=3.12"
+requires-python = ">= 3.11"
 dependencies = [
     "catboost>=1.2.8",
+    "faiss-cpu>=1.13.2",
     "imblearn>=0.0",
     "ipykernel>=6.29.5",
-    "keras>=3.11.3",
+    "langchain>=1.2.0",
+    "langchain-community>=0.4.1",
+    "langchain-huggingface>=1.2.0",
+    "langchain-ollama>=1.0.1",
     "matplotlib>=3.10.1",
     "nbformat>=5.10.4",
     "numpy>=2.2.5",
     "opencv-python>=4.11.0.86",
-    "pandas>=2.2.3", 
+    "pandas>=2.2.3",
     "pandas-stubs>=2.3.2.250926",
     "plotly>=6.3.0",
+    "pypdf>=6.5.0",
     "scikit-learn>=1.6.1",
     "scipy>=1.15.2",
     "seaborn>=0.13.2",
+    "sentence-transformers>=5.2.0",
     "shap>=0.49.1",
     "tensorflow>=2.20.0",
+    "tf-keras>=2.20.1",
     "xgboost>=3.1.2",
     "yfinance>=0.2.66",
 ]