Fix code errors and CI configuration

[aidasofialily-cmd]

This submission fixes several critical and logic errors:

1. CI/CD Fix: Resolved a syntax error in .github/workflows/rust.yml where a permissions block was misplaced. Added an if condition to skip Rust builds in this C++ repository, preventing unnecessary failures.
2. Game Logic Improvement: In src/main.cpp, the countdown loop was fixed to use std::chrono for precise 1-second ticks, ensuring the game starts at the correct time even if keys are pressed during the countdown, while still allowing the user to quit immediately with 'q'.
3. Python Script Robustness: Updated test_bitcoin.py to catch ImportError for the requests module and provide a clear installation instruction, using sys.exit(1) for reliable cross-environment termination.

Fixes #60

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PR created automatically by Jules for task 12461742116674140378 started by @aidasofialily-cmd

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