Octreelib

What's Changed
* CI: tests, linters by true-real-michael in https://github.com/true-real-michael/octreelib/pull/14
* OctreeManager and vector operations by true-real-michael in https://github.com/true-real-michael/octreelib/pull/17


**Full Changelog**: https://github.com/true-real-michael/octreelib/compare/v0.0.2...v0.0.3

Class diagram

What's Changed
* fixed voxels colors in visualization
* fixed point insertion

**Full Changelog**: https://github.com/true-real-michael/octreelib/compare/v0.0.1...v0.0.2

Implemented Functionality
- `Grid` as the main class for interaction with the library
- Point clouds are implemented using numpy arrays

**Full Changelog**: https://github.com/true-real-michael/octreelib/commits/v0.0.1

Supported Functionality
- `GridWithPoints`
- `StaticGrid`
All of the above use `np.ndarray` as `Point` and `List[Point]` as `PointCloud`