Add logging of print statements

[eyoung55]

This PR adds a function to redirect all normal print statements to also be captured in a logfile. The file is situated at the top-level output directory, e.g., {params.general.output_dir}/logfile.log. Entries in the logfile are timestamped and marked INFO or ERROR.

Changes:

• Call the start_print_and_log function immediately after parsing the user params
• Added a function to redirect stdout and stderr to the normal terminal/command line display but also write a copy of the message to a log file

closes #56

[eyoung55]

Example logfile.log

2025-04-18 17:13:41 [INFO] Starting PVade Run
2025-04-18 17:13:41 [INFO] vol_tag_list =
2025-04-18 17:13:41 [INFO] [(2, 2), (2, 3)]
2025-04-18 17:13:41 [INFO] structure
2025-04-18 17:13:41 [INFO] 2
2025-04-18 17:13:41 [INFO] fluid
2025-04-18 17:13:41 [INFO] 3
2025-04-18 17:13:41 [INFO] Making structure = 9
2025-04-18 17:13:41 [INFO] Making fluid = 10
2025-04-18 17:13:41 [INFO] Starting mesh generation...
2025-04-18 17:13:41 [INFO] Finished.
2025-04-18 17:13:41 [INFO] Total meshing time = 0.0 s
2025-04-18 17:13:41 [INFO] Creating fluid submesh
...