Create comprehensive interview guides for C++, Python, and Software Architecture

[Copilot]

This PR creates extensive and comprehensive interview guides for three key technology areas, replacing the minimal placeholder content with in-depth resources for technical interview preparation.

What's Changed

C++ Interview Guide (cpp/interview.md)

• 660 lines of comprehensive C++ interview content
• Covers fundamental concepts (data types, memory management, OOP)
• Advanced topics including move semantics, template metaprogramming, and concurrency
• Common interview questions with detailed explanations and code examples
• Best practices including RAII, smart pointers, and modern C++ guidelines
• Real-world scenarios for performance-critical applications
• Coding patterns and anti-patterns with practical examples
• Performance considerations and optimization techniques
• Modern C++ features (C++11/14/17/20) and industry trends

Python Interview Guide (python/interview.md)

• 1,856 lines of comprehensive Python interview content
• Fundamental concepts (data types, control flow, functions, OOP)
• Advanced topics including decorators, generators, context managers, and metaclasses
• Common interview questions covering Python internals, GIL, and memory management
• Best practices with PEP 8, type hints, error handling, and testing
• Real-world scenarios including web development, data processing, and async programming
• Coding patterns (Factory, Strategy, Observer) and anti-patterns to avoid
• Performance optimization techniques and profiling
• Modern Python practices including dataclasses, Pydantic, async/await, and current industry trends

Software Architecture Interview Guide (architecture/interview.md)

• 1,940 lines of comprehensive architecture interview content
• Fundamental design principles (SOLID, DRY, KISS, YAGNI) with practical examples
• System architecture patterns (monolithic, microservices, serverless, event-driven)
• Scalability and performance considerations including load balancing and caching strategies
• Database design covering SQL vs NoSQL, sharding, and consistency patterns
• Common interview questions with system design scenarios (URL shortener, chat application)
• Real-world system design scenarios (e-commerce, social media, video streaming)
• Best practices and anti-patterns in API design, security, and error handling
• Modern architecture trends including serverless, Kubernetes, DevOps, and observability

Key Features

All guides include:

• Clear table of contents with hierarchical navigation
• Code examples in multiple languages with practical implementations
• Interview questions with detailed explanations and sample answers
• Real-world scenarios demonstrating practical application of concepts
• Best practices and anti-patterns with do's and don'ts
• Modern trends and industry-standard practices
• Proper Markdown formatting with consistent structure and readability

Content Quality

Each guide provides:

• Theoretical foundations with practical applications
• Code examples that compile and run
• Interview preparation strategies and tips
• Performance considerations and optimization techniques
• Security best practices where applicable
• Modern tooling and ecosystem recommendations

These comprehensive guides serve as complete interview preparation resources, covering everything from fundamental concepts to advanced architectural decisions that candidates might encounter in technical interviews.

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