Improved exception handling, Email Input sanitization and code refactoring

[PythonHacker24]

Current Fixes and Improvements

• Improved exception handling till option 3 in the cases of no relevant inputs
• Dependences checking added
• Email Input sanitization initiated (more to be improved)
• Improved readability and applied more concise methods to add a new line character
• Disclaimer updated for more clarity
• Added input initialization in cases of empty inputs

Further Improvement Plans

• Adding colour coding for better UX
• More hardcore parameters for input sanitization
• Adding optparse library as an option for fast-paced input-taking
• Expanding country lists

[PythonHacker24]

Organized the code into modules for reusability and readability. I also added state abbreviations for the USA.

[PythonHacker24]

I directly copied all the code in your repo to my repo and made changes to update it. So consider that the updates are made directly on the top of your repo, not mine.