[Feature request] Handle read-only directories

[beeradmoore]

Is your feature request related to a problem? Please describe.
DLSS Swapper attempts to write files into various places:

• game folders
• system temp
• relative folders to the executable
• system app data

(see full list here)

It is currently unclear what happens in each of these scenarios when attempting to write to a directory that is read-only.

Describe the solution you'd like
Log the error to the error log for future reference and display a useful message to the end user rather than a generic "oh no I failed to do a thing" error.

Additional context
This was unintentional discovered in #120 when DLSS Swapper would attempt to write to system32 but there are other scenarios where this could happen. EG. running portable DLSS Swapper in a folder that is read-only. Games may apply a read-only flag to specific sub directories to prevent tamepring.