Refactor type hints to use built-in generics #18

[sql-hkr]

This pull request updates type annotations across the codebase to use standard Python built-in generics instead of importing types like Tuple and Dict from the typing module. This modernizes the code, improves readability, and aligns with best practices for Python 3.9 and later. No functional changes are introduced.

Type annotation modernization:

• Replaced all uses of Tuple, Dict, and List from the typing module with built-in generics (tuple, dict, list) in function signatures and type hints throughout the following modules: function.py, math.py, layer.py, adadelta.py, adagrad.py, adam.py, optimizer.py, dataloaders.py, rl.py, and util.py.

Cleanup of unused imports:

• Removed now-unnecessary imports of Tuple, Dict, and List from the typing module in all affected files.