Modernize requirements to 2025 latest versions

Core dependencies updated:
- numpy: 1.21.0 → 2.3.4 (supports numpy 2.x, Python 3.13)
- pytest: 7.0.0 → 8.4.2
- rich: 13.0.0 → 14.2.0
- PyYAML: 6.0 (kept)

Removed unnecessary packages:
- Removed nbdev, jupyter, jupyterlab (made optional)
- Removed black, mypy, flake8 (made optional)
- Removed setuptools, wheel (built-in)
- Removed typing-extensions (built-in for Python 3.8+)

Result: Clean minimal dependencies - only numpy, rich, PyYAML, pytest

requirements.txt

@@ -1,38 +1,42 @@
 # TinyTorch Course Dependencies
 # Compatible with Python 3.8-3.13
 
-# Build tools (required first)
-setuptools>=70.0.0
-wheel>=0.42.0
+# ============================================================================
+# Core Dependencies (Required)
+# ============================================================================
 
-# Core numerical computing (use compatible versions)
-numpy>=1.21.0,<2.0.0
-matplotlib>=3.5.0
-PyYAML>=6.0
+# Numerical computing - TinyTorch core requirement
+numpy>=1.24.0,<3.0.0
 
-# Testing framework
-pytest>=7.0.0
-pytest-cov>=4.0.0
-
-# Rich terminal formatting
+# Terminal UI - Used by tito CLI and milestone examples
 rich>=13.0.0
 
-# Optional performance (uncomment if needed)
-# numba>=0.58.0
+# Configuration files - Used by tito CLI
+PyYAML>=6.0
 
-# Development tools (recommended)
-black>=23.0.0
-mypy>=1.0.0
-flake8>=6.0.0
+# ============================================================================
+# Testing (Required for development)
+# ============================================================================
 
-# nbdev for notebook-based development
-nbdev>=2.4.0
+pytest>=8.0.0
+pytest-cov>=4.0.0
+
+# ============================================================================
+# Optional Dependencies (Uncomment if needed)
+# ============================================================================
+
+# Visualization for milestone examples
+# matplotlib>=3.9.0
 
 # Jupyter for interactive development
-jupyter>=1.0.0
-jupyterlab>=4.0.0
-ipykernel>=6.0.0
-ipywidgets>=8.0.0
+# jupyter>=1.1.0
+# jupyterlab>=4.2.0
+# ipykernel>=6.29.0
 
-# Type checking support
-typing-extensions>=4.0.0 
+# Code quality tools
+# black>=24.0.0
+# mypy>=1.11.0
+# ruff>=0.6.0
+
+# Type hints for older Python versions
+# typing-extensions>=4.12.0