Add feature to track progress and display remaining time in terminal

[nsozturk]

I would like to request a feature that allows users to track the current progress directly from the terminal while using the LinuxDir2HTML tool. Along with progress updates, it would be helpful to display the estimated remaining time for completion.

Requested features:

• [ ] Real-time progress updates in the terminal.
• [ ] Estimated remaining time display.
• [ ] tqdm and progressbar2 library could be added.

Some samples

Processing: 30%|███ | 30/100 [00:03<00:07, 9.14it/s]

Processing:   0%|          | 0/100 [00:00<?, ?it/s]
Processing:  10%|█         | 10/100 [00:01<00:09,  9.22it/s]
Processing:  20%|██        | 20/100 [00:02<00:08,  9.25it/s]
Processing:  30%|███       | 30/100 [00:03<00:07,  9.27it/s]
Processing:  40%|████      | 40/100 [00:04<00:06,  9.28it/s]
Processing:  50%|█████     | 50/100 [00:05<00:05,  9.29it/s]
Processing:  60%|██████    | 60/100 [00:06<00:04,  9.29it/s]
Processing:  70%|███████   | 70/100 [00:07<00:03,  9.30it/s]
Processing:  80%|████████  | 80/100 [00:08<00:02,  9.30it/s]
Processing:  90%|█████████ | 90/100 [00:09<00:01,  9.30it/s]
Processing: 100%|██████████| 100/100 [00:10<00:00,  9.31it/s]

[nsozturk]

added this feature and have tested. @homeisfar here: https://github.com/homeisfar/LinuxDir2HTML/pull/17