feat: Add I/O modules for reading and writing to files

[lsetiawan]

We need the following APIs for the python io, TBD whether to write this directly in Rust:

# Read the vector/matrix csv file
def read_csv():
    ...

# Read the newick tree text file... non-binary file
# should only contain newick tree string
def read_newick():
    ...

# Writes the vector/matrix to a csv file
def write_csv():
    ...

# Writes newick string to a text file
def write_newick():
    ...

# Read the nexus file... non-binary file
# NOTE: Stretch goal
def read_nexus():
    # Use biopython to read the nexus file
    ...

Biopython resource: https://biopython.org/docs/latest/Tutorial/chapter_phylo.html

[madelinegordon]

Discussed - decided on using Python for I/O