[Enhancement] Remove symlinks from the ROM / Emulation directory

[khowe085]

This is related to Issue 59. Making it a separate issue as it is a bigger lift.

This request is to essentially automate the manual process I outlined in the previous issue. By Default Emudeck would create and manage the ROM / Emulation directory in the OS app data folder exactly how it is now, symlinks included. The existing tooling would point at the app data Emulation directory. Symlinks would then be created from the app data Emulation folder to the appropriate folders in the user selected ROM / Emulation directory.

This would also hide the implementation detail of having the \covers and \marquees folders in the downloaded_media folder and the symlinks in \storage that point to \saves. The only symlinks are the \media links in the individual ROM directories, which I'm still trying to figure out how to eliminated in my own process.

Edit: I think the symlinks in a hidden app data ROM Directory could also be hide the difference between where the firmware / keys go ryujinx and yuzu in the user managed ROM directory.