Enhance download.sh with Verbose Logging, Error Handling, and Dependency Checks

[nehalmr]

Enhance download.sh with Verbose Logging, Error Handling, and Dependency Checks

Description:

This pull request improves the download.sh script by:

1. Verbose Output: Enabled using set -ex to trace command execution and exit on errors.
2. Dependency Checks: Added a check to ensure wget is installed before script execution.
3. Error Handling: Implemented robust error handling to safely exit the script if any download or checksum verification fails.
4. Progress Logging: Included clear progress messages to enhance user feedback during execution.

These changes ensure better usability and reliability for users downloading models.

Checklist:

• Verified wget dependency.
• Added error handling for all critical commands.
• Tested script with different scenarios.
• Updated the script to log progress clearly.

Testing:

The script was tested with various model sizes and under different network conditions to ensure stability and correct error handling. All scenarios were handled gracefully, with appropriate feedback provided to the user.

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[nehalmr]

Can you please review and respond.