Add "scan_directory(directory, recursive_flag)" Function

[legendarychristian]

Added a new scan_directory function that takes in 2 parameters: directory, and recursive_flag. Adding a directory tells the function to scan all the files in the directory and setting the recursive_flag to TRUE allows the function to recursively check all subdirectories within the parent directory.

This resolves #4 and #5. This closes user story #1.

[Speedrunyourknowledge]

I fixed a few syntax errors that appeared in the PR checks. I tested the scan_directory function locally, and it works as expected.

Screenshots

Comparing the scan_directory output to the original identify_path output on the tests_data directory

[Speedrunyourknowledge]

Looks good