Modernize C++ includes and add OpenGL renderer foundation

[awest813]

Summary

This PR modernizes the codebase by replacing legacy C-style headers with C++ standard library equivalents, and introduces a new OpenGL-based graphics renderer module with supporting infrastructure.

Key Changes

C++ Header Modernization

• Replaced C-style headers (<stdio.h>, <stdlib.h>, <math.h>, <assert.h>, <errno.h>, <time.h>) with C++ equivalents (<cstdio>, <cstdlib>, <cmath>, <cassert>, <cerrno>, <ctime>) across multiple source files
• Updated code comments to use nullptr instead of NULL in documentation
• Added -std=c++11 flag to configure.in for C++ standard compliance

New OpenGL Graphics Module (src/modules/graphic/oglgraph/)

• OGLRenderer: Core renderer class managing geometry, shadows, post-processing, particles, and skid marks
• Shader: Shader program compilation and management with error handling
• Texture: Texture loading and caching system with fallback support
• AC3DLoader: Parser for AC3D model format with material and surface handling
• PostProcess: Post-processing effects framework (bloom, color correction)
• ShadowMap: Shadow mapping implementation for dynamic lighting
• Particles: Particle system for effects (dust, smoke, sparks)
• SkidMarks: Real-time skid mark rendering
• Camera: Camera management and view matrix calculations
• Mesh: Mesh data structure and rendering
• GLSL Shaders: Geometry, shadow, particle, and post-processing shader implementations

Documentation and Testing

• Added CONTRIBUTING.md: Development environment setup and contribution guidelines
• Added ROADMAP.md: Project direction and priorities for Open Racing Simulator fork
• Added test/math/: Unit tests for vector math library (v2t, v3t) with test framework
• Updated robot tutorial documentation to reference "Open Racing Simulator"
• Updated architecture documentation

Project Rebranding

• Updated page titles and references from "TORCS" to "Open Racing Simulator" across web interface and documentation
• Updated credits and FAQ pages

Build System

• Added Makefile for oglgraph module
• Added Makefile for math unit tests
• Updated .gitignore for test artifacts

Implementation Details

• The new renderer uses modern OpenGL 3.3+ with VAO/VBO for efficient rendering
• Shader system supports dynamic compilation with detailed error reporting
• Texture manager implements singleton pattern with LRU-style caching
• AC3D loader handles hierarchical object structures with transformations
• Post-processing pipeline supports multiple effects through framebuffer objects
• Math test suite provides foundation for vector/matrix operations validation

https://claude.ai/code/session_014bb7MjvNn1nPjSHzkQhsJF