add SpeedTest

[rubalsxngh]

This pull request addresses the Advanced Task to create GUI based SpeedTest, outlined in Issue Number: #50

Task Accomplished:

• [X] Implemented a simple visual interface using the tkinter library under scripts/speedtest
• [X] Displayed the download, upload speeds and Ping in a GUI window.
• [X] Included a button to trigger the speed test.
• [ ] Organize the functionality into a class named SpeedTester.
• [ ] The class should encapsulate the speed test logic and GUI components.
• [ ] Instantiate the class and run the GUI application.

@IQExotic, could you please review these changes and provide your feedback? Thank you!

[rubalsxngh]

Hello @IQExotic , thanks for the feedback.

I've implemented the suggested changes and completed the tasks as discussed:

• [X] Resolved redundant code and set button states appropriately.
• [X] Added comprehensive error handling for potential SpeedTest and image loading issues.
• [X] Enhanced UI feedback to provide a more responsive indication of the SpeedTest process.
• [X] Updated comments on resize image function for better clarity and understanding.

Please take a moment to review, if everything aligns with your expectations.

[rubalsxngh]

@IQExotic , Thanks for the review. I'll add an alternative option to launch, if the image not found. Moreover, I am open to receiving additional instructions for the project.