feat: RB-Tree implementation and unit tests

[johnburbridge]

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[codecov-commenter]

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Codecov Report

Attention: Patch coverage is 73.19588% with 26 lines in your changes missing coverage. Please review.

Files with missing lines	Patch %	Lines
...ime_based_storage/concurrent/thread_safe_rbtree.py	64.81%	19 Missing ⚠️
...ased_storage/src/time_based_storage/core/rbtree.py	83.72%	7 Missing ⚠️

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