Replace file transfer code with file transfer tool

### 📝 Description of the feature

A file transfer tool (server and client) now exists to support PyAnsys projects. This enhancement requests the adoption of the tool rather than using the file upload/download code in this project.

### 💡 Steps for implementing the feature

_No response_

### 🔗 Useful links and references

https://filetransfer-server.tools.docs.pyansys.com
https://filetransfer.tools.docs.pyansys.com
https://ansys-my.sharepoint.com/:p:/p/dominik_gresch/Edek0UJgyF5GrWF-6jOzHr8B-_xZexDRiewifyorELqjHw?e=8LKDnu

Start by locating the existing file upload and download code in the project, then read the linked filetransfer-server and filetransfer documentation. Done means the project adopts the file transfer tool for file transfers instead of its current upload/download implementation, with existing behavior preserved.

Written by the indexing model from the issue text.