Added test file for banners module

[Santhosh-Siddhardha]

Description

This pull request adds a test file (banners_test.py) to the repository in src/test. The test file contains unit tests for the Scraper88x31 class in banners module , ensuring its functionality is thoroughly evaluated and validated.

Resolves: #1093

Checklist

Before submitting this pull request, kindly verify that the ensuing checkpoints have been reached.

• Have you adhered to the repository's defined coding convention rules?
• Have you updated the 'documentation.md' file with the method/function documentation?
• Have you sent a message along with the result or response?
• Have you used the try-catch technique?
• Has the method/class been added to the documentation (md file)?

Screenshots

Additional Notes/Comments

NA

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[github-actions]

Great work @Santhosh-Siddhardha !!
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