Consider adding value of NSLocalNetworkUsageDescription for Sunshine

[cathyjf]

This might help with LizardByte/Sunshine#3340. See also:

• https://developer.apple.com/documentation/technotes/tn3179-understanding-local-network-privacy#macOS-considerations
• https://developer.apple.com/documentation/bundleresources/information_property_list/nslocalnetworkusagedescription

[cathyjf]

Possibly helpful discussion on how to embed an Info.plist file into the binary without having to use an app bundle:

• https://discourse.cmake.org/t/how-to-embed-info-plist-in-a-simple-mac-binary-file/512/2

(Once #546 is fixed, the Info.plist file will live separately in the bundle.)

[ReenigneArcher]

Converting to a feature request. You're free to make an attempt at this and create a PR.