Fix code scanning alert no. 1: Arbitrary file access during archive extraction ("Zip Slip")

[sayedpfe]

Fixes https://github.com/sayedpfe/TechExcel-Accelerate-developer-productivity-with-GitHub-Copilot-and-Dev-Box/security/code-scanning/1

To fix the problem, we need to ensure that the paths derived from the zip archive entries are validated to prevent directory traversal attacks. This involves:

1. Using Path.GetFullPath to resolve any directory traversal elements in the combined path.
2. Ensuring that the resolved path is within the intended destination directory.

The steps to implement the fix are:

1. Combine the destination directory and the entry's full name using Path.Combine.
2. Resolve the combined path using Path.GetFullPath.
3. Resolve the destination directory path using Path.GetFullPath.
4. Check if the resolved file path starts with the resolved destination directory path.
5. If the check fails, throw an exception to prevent extraction.
6. If the check passes, proceed with extracting the file.

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