refactor: Entire code base, thread and log usage

Boils down to:
- Include headers
- Reduce boiler plate with helpers
- Swap out explicit usages with core API layer
  and ensure the right API is configured beforehand

src/main/iidxhook-d3d9/bb-scale-hd.c

@@ -2,13 +2,13 @@
 
 #include <windows.h>
 
+#include "core/log.h"
+
 #include "d3d9-util/vertex.h"
 
 #include "bb-scale-hd.h"
 #include "util.h"
 
-#include "util/log.h"
-
 static bool iidxhook_d3d9_bb_scale_initialized;
 static uint16_t iidxhook_d3d9_bb_scale_hd_width;
 static uint16_t iidxhook_d3d9_bb_scale_hd_height;

src/main/iidxhook-d3d9/util.h

@@ -3,9 +3,9 @@
 
 #include <windows.h>
 
-#include "d3d9-util/dxerr9.h"
+#include "core/log.h"
 
-#include "util/log.h"
+#include "d3d9-util/dxerr9.h"
 
 inline void
 iidxhook_d3d9_util_check_and_handle_failure(HRESULT hr, const char *msg)