Add comprehensive quadrilateral documentation and kite analysis

[AronT-TLV]

This PR adds extensive quadrilateral documentation and mathematical analysis, particularly focusing on kite geometry and area calculations.

Documentation Enhancements

• New Quadrilateral Section: Added comprehensive documentation in docs/src/Geometry/02 Quadrilaterals.md
• Geometric Proofs: Added geometric proofs for kite and trapezoid area formulas
• Updated Documentation Structure: Modified docs/make.jl to include quadrilateral documentation

Mathematical Analysis

• Kite Geometry: Detailed analysis of kite properties, diagonal calculations, and area formulas
• Area Calculation Methods: Implemented and compared multiple approaches:
  • Heron's formula method
  • Trigonometric method
  • Diagonal method (with analysis of limitations)
• Trapezoid Examples: Added two comprehensive trapezoid calculation examples

Notebook Improvements

• Enhanced Basics.ipynb: Added detailed kite and trapezoid calculations
• Mathematical Rigor: Included geometric proofs and constraint analysis
• Code Organization: Split complex calculations into clear, readable cells

Key Mathematical Insights

• Kite Symmetry Analysis: Proven that only one pair of opposite angles are equal in a kite
• Diagonal Method Limitations: Demonstrated why the diagonal method requires additional constraints
• Comprehensive Validation: All area calculations validated using multiple independent methods

Testing & Validation

• All mathematical formulas verified with concrete examples
• Geometric proofs included for theoretical foundation
• Multiple calculation methods cross-validated

This work significantly enhances the Math_Foundations project with rigorous quadrilateral geometry analysis and comprehensive documentation.