Dev - #7

feat: add ModernThreadSafeStack with tests

…variable

feat: add ModernThreadSafeStack thread-safe container with condition variable

…Shared Ptr

…-safe-stack

feat: add SharedPtrWaitingThreadSafeStack thread-safe container with Shared Ptr

…ture

…-stack

feat: implement lock-based thread-safe stack with node-based architecture

…ations

…g-linked-stack

feat: add condition variable support for blocking pop operations

feat: implement multiple thread-safe stacks and performance benchmark