Add build argument to separate SlimeTest and SlimeGame

[ConnorY97]

Separate slimetest and slimegame projects in CMake build

Description

Currently, the slimetest and slimegame projects are built together using a single CMake command. This ticket aims to separate these projects to improve build flexibility and maintainability.

Tasks

1. Modify the build command to allow building each project independently.
2. Test the separate builds to ensure they work correctly.
3. Update any CI/CD pipelines to accommodate the separated builds.

Acceptance Criteria

• [ ] slimetest and slimegame can be built independently using separate CMake commands.
• [ ] Building both projects together still works as before.

Additional Notes

• This change will require updates to build scripts and potentially CI/CD configurations.
• Developers should be notified of the new build process once implemented.
• Create a new Test branch to run tests and a build branch to make executables

[ConnorY97]

Alex expected an issue with: Error: Failed to detect any supported platform Test failed with exception: Failed to initialize GLFW. I have enabled some more detailed logging but am unsure how to proceed.

I am moving onto getting the builds to be uploaded with an action.