Adds a BeforeInstall step to the InnoSetup installer which uses the msvc-redist-helper tool to automatically check for the necessary DLLs and install the required redistributable if some are found to be missing.
Additionally slightly modernized the installer with a design that isn't from the 90s, and paves the way for preventing updating StreamFX while OBS Studio is still running.
Michael Fabian 'Xaymar' Dirks