Update WifI marauder app

https://github.com/0xchocolate/flipperzero-firmware-with-wifi-marauder-companion/pull/11

applications/external/wifi_marauder_companion/file/sequential_file.c

@@ -0,0 +1,46 @@
+#include "sequential_file.h"
+
+char* sequential_file_resolve_path(
+    Storage* storage,
+    const char* dir,
+    const char* prefix,
+    const char* extension) {
+    if(storage == NULL || dir == NULL || prefix == NULL || extension == NULL) {
+        return NULL;
+    }
+
+    char file_path[256];
+    int file_index = 0;
+
+    do {
+        if(snprintf(
+               file_path, sizeof(file_path), "%s/%s_%d.%s", dir, prefix, file_index, extension) <
+           0) {
+            return NULL;
+        }
+        file_index++;
+    } while(storage_file_exists(storage, file_path));
+
+    return strdup(file_path);
+}
+
+bool sequential_file_open(
+    Storage* storage,
+    File* file,
+    const char* dir,
+    const char* prefix,
+    const char* extension) {
+    if(storage == NULL || file == NULL || dir == NULL || prefix == NULL || extension == NULL) {
+        return false;
+    }
+
+    char* file_path = sequential_file_resolve_path(storage, dir, prefix, extension);
+    if(file_path == NULL) {
+        return false;
+    }
+
+    bool success = storage_file_open(file, file_path, FSAM_WRITE, FSOM_CREATE_ALWAYS);
+    free(file_path);
+
+    return success;
+}