Implement persistent and scoped environment variable management

.github/prompts/Improvement.prompt.md

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+mode: ask
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+Utilize cutting-edge C++ standards to achieve peak performance by implementing advanced concurrency primitives, lock-free and high-efficiency synchronization mechanisms, and state-of-the-art data structures, ensuring robust thread safety, minimal contention, and seamless scalability across multicore architectures. Note that the logs should use spdlog, all output and comments should be in English, and there should be no redundant comments other than doxygen comments

.github/prompts/RemoveRedundancy.prompt.md

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+mode: ask
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+Thoroughly analyze the code to maximize the effective use of existing components, remove any redundant or duplicate logic, and refactor where necessary to enhance reusability, maintainability, and scalability, ensuring the codebase remains robust and adaptable for future development.