Added subtitle translation into other languages

[adills]

Great code! I only added the ability to use deep_translator to take your extracted subtitle and run it through a new function to translate the text into a different language.

I tested it with my personal video on a MacBook Pro M1 Max. I ran this to test:

pipenv run auto_subtitle ~/Downloads/PXL_20241007_234301920.mp4 --language_out es --model medium --output_dir ..

I hope you pull this for others to use.

[what-the-diff]

PR Summary

• New Feature for Translating Subtitles
  The developer team has added a fantastic new feature in your command-line tool that allows users to translate the subtitles into their language of choice, improving accessibility. Supported languages include Spanish, with an easy-to-use command-line option (--language_out es).

• Updated Setup and Requirements
  To ensure that this new translation feature works correctly, your team has also updated the necessary setup files (setup.py) and requirements (requirements.txt). This way, the program will automatically install deep_translator, a key software component that executes the translation functions.

• Enhanced Core Functionality
  The part of the code responsible for processing subtitles has been changed to include the new translation function. This ensures that the added feature integrates smoothly with the existing application. This change contributes significantly to improving user experience, giving them content in the language they understand best.