Major upgrade - Moved to using Python

[SSP6904]

Overview

This pull request migrates the project from a C++/MSBuild-based Windows application to a Python-based application, changing the build and release process accordingly. The C++ source code and Visual Studio project files are removed, and new Python build configuration and GitHub Actions workflow files are introduced to build, package, and release the application as a standalone executable using PyInstaller.

Details

Migration from C++ to Python

• Removed all C++ source files and Visual Studio project files, including AutoWinInstaller.cpp, AutoWinInstaller.sln, AutoWinInstaller.vcxproj, and AutoWinInstaller.vcxproj.filters, effectively dropping the C++ implementation and build system.

Python build and release setup

• Added a new PyInstaller spec file (AutoWinInstaller.spec) to define how the Python application should be packaged as a standalone executable.
• Introduced a GitHub Actions workflow (.github/workflows/buildapp.yml) to automate building and publishing the Python application as a release when a new version tag is pushed.
• Removed the old MSBuild-based workflow (.github/workflows/msbuild.yml) that was used for building and releasing the C++ application.
• Introduced a new way to run the program within the command prompt (uses the Textual library for that)

Repository configuration cleanup

• Removed .gitattributes settings that were specific to Visual Studio and C++ development, reflecting the project's migration away from those technologies.

Completed tasks

• Removed all C++ related files from the branch
• Added the Python files
• Created a new workflow for building the application
• Rewrite all of the screens from the old source code (transferring them in this case)
• Do some testing before pushing the changes to the main branch