Using FindFirstFileA() instead of CreateFileA() to get the file size

Since we already call FindFirstFileA() and it returns the size there is
no need to open/close every file to get it's size

platform.h

@@ -46,18 +46,25 @@ static double timer_stop(HiResTimer *t) {
 }
 
 // MPMC Queue
+static MPMCQueue g_dir_queue;
 static MPMCQueue g_file_queue;
 
+typedef struct {
+  mem_arena *path_arena;
+  mem_arena *meta_arena;
+
+  MPMCQueue *dir_queue;
+  MPMCQueue *file_queue;
+} ScannerContext;
+
 typedef struct {
   MPMCQueue *queue;
   mem_arena *arena;
 } WorkerContext;
 
 /* Scan folders */
-typedef struct DirQueue DirQueue;
 
-void scan_folder_windows_parallel(const char *base, DirQueue *q);
-void scan_folder_posix_parallel(const char *base, DirQueue *q);
+typedef struct DirQueue DirQueue;
 
 typedef struct DirJob {
   char *path;
@@ -80,3 +87,7 @@ typedef struct DirQueue {
   pthread_cond_t cond;
 #endif
 } DirQueue;
+
+// void scan_folder_windows_parallel(const char *base, ScannerContext *ctx);
+// void scan_folder_posix_parallel(const char *base, ScannerContext *ctx);
+void scan_folder_windows_parallel(const char *base, DirQueue *q);