fix: Opening files on macOS through the Open with... option

Fixes #1070

lib/libimhex/source/helpers/utils.cpp

@@ -679,6 +679,7 @@ namespace hex {
 
     static std::optional<std::fs::path> fileToOpen;
     extern "C" void openFile(const char *path) {
+        log::info("Opening file: {0}", path);
         fileToOpen = path;
     }
 

lib/libimhex/source/helpers/utils_macos.m

@@ -74,6 +74,10 @@
         NSString* urlString = [url absoluteString];
         const char* utf8String = [urlString UTF8String];
 
+        const char *prefix = "file://";
+        if (strncmp(utf8String, prefix, strlen(prefix)) == 0)
+            utf8String += strlen(prefix);
+
         openFile(utf8String);
 
         return YES;