C++ backend for Red Black Trees

[Kishan-Ved]

Related to: Google Summer of Code 2024, Kishan Ved

Objective

Add a C++ backend for Red Black Tree class.

Related issue: #550

[codecov[bot]]

Codecov Report

All modified and coverable lines are covered by tests :white_check_mark:

Project coverage is 94.425%. Comparing base (ec0b015) to head (bc02f34). Report is 3 commits behind head on main.

:exclamation: Current head bc02f34 differs from pull request most recent head a6ad1d1

Please upload reports for the commit a6ad1d1 to get more accurate results.

Additional details and impacted files

```diff @@ Coverage Diff @@ ## main #560 +/- ## ============================================= - Coverage 97.552% 94.425% -3.128% ============================================= Files 34 36 +2 Lines 4331 4377 +46 ============================================= - Hits 4225 4133 -92 - Misses 106 244 +138 ``` | [Files](https://app.codecov.io/gh/codezonediitj/pydatastructs/pull/560?dropdown=coverage&src=pr&el=tree&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=codezonediitj) | Coverage Δ | | |---|---|---| | [pydatastructs/trees/binary\_trees.py](https://app.codecov.io/gh/codezonediitj/pydatastructs/pull/560?src=pr&el=tree&filepath=pydatastructs%2Ftrees%2Fbinary_trees.py&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=codezonediitj#diff-cHlkYXRhc3RydWN0cy90cmVlcy9iaW5hcnlfdHJlZXMucHk=) | `83.626% <100.000%> (-14.239%)` | :arrow_down: | [](https://app.codecov.io/gh/codezonediitj/pydatastructs/pull/560?src=pr&el=tree&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=codezonediitj)