[docs] Create project documentation on Bianch Tech site

[pedrobiqua]

Develop comprehensive documentation for the project and publish it on the Bianch Tech website. The documentation should cover:

• Project overview and objectives.
• Instructions for building and using the library.
• Explanation of core structures and algorithms (e.g., KDTree, BallTree, classifiers).
• Examples of usage in C++ and Python.

This will make the project easier to understand and accessible to new users and contributors.