Add Base64 Decode usage example for SplashKit utilities

[Mdanial01]

Description

This pull request adds a Base64 Decode usage example for the SplashKit utilities.
It demonstrates how to decode Base64-encoded strings and handle invalid input gracefully.

Motivation and Context:

This example complements the Base64 Encode example by showing how to reverse the process, helping users understand how to use the SplashKit Base64 utility for decoding operations.

Dependencies:

No additional dependencies were introduced in this change.

Type of change

• New feature (non-breaking change which adds functionality)

How Has This Been Tested?

The example was tested by running the script locally and verifying:

• Proper decoding of valid Base64 strings.
• Correct error handling for invalid input.
• Output consistency with the expected decoded string.

Steps to reproduce:

• Navigate to the example directory.
• Run the file base64_decode-1-example.py.
• Observe the decoded output printed in the console.

Testing Checklist

• Tested in latest Chrome
• Tested in latest Firefox
• npm run build
• npm run preview

Checklist

If involving code

• My code follows the style guidelines of this project
• I have performed a self-review of my own code
• I have commented my code in hard-to-understand areas
• I have made corresponding changes to the documentation
• My changes generate no new warnings

If modified config files

• I have checked the following files for changes:
  • package.json
  • astro.config.mjs
  • netlify.toml
  • docker-compose.yml
  • custom.css

Folders and Files Added/Modified

• Added:
  • examples/utilities/base64_decode-1-example.py
    Modified:
• None

Additional Notes

This example is part of the ongoing effort to expand the SplashKit utilities examples collection for better developer understanding and usability.

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