feat: Add matrix module that would work with vector with branch lengths

[lsetiawan]

Overview

We need to port over functionality to work with a matrix form of the phylo2vec vector. This form includes branch lengths. The current implementation can be found in the python code at https://github.com/Neclow/phylo2vec_dev/blob/main/phylo2vec/matrix/to_matrix.py. The current demo for this functionality can be found at https://github.com/Neclow/phylo2vec_dev/blob/main/demo_matrix.ipynb

Action Items

• feat: Port over sample_matrix function to Rust
• feat: Port over check_m function to Rust
• feat: Port over to_newick function that takes matrix to Rust
• feat: Port over to_matrix function to Rust
• feat: Port over to_matrix_no_parents function to Rust