Upgrade app to .NET 10 #138
Description
As per the history of this project, we aim to stay on the latest version of .NET. Currently, the app targets .NET 8. We should upgrade it to .NET 10 as that is now GA.
As an aside, I previously had only expected to target the latest LTS version of .NET, hence why this is on .NET 8 instead of 9. Since then, however, Microsoft has extended the support window for STS releases such that they go out of support on the same day as the prior LTS release. This means we should be able to safely target .NET 11 next year if we want to, but will defer that decision for now.