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/config/buttons.c

@@ -15,11 +15,12 @@
 #include "config/schema.h"
 #include "config/usages.h"
 
+#include "core/log.h"
+
 #include "geninput/input-config.h"
 #include "geninput/mapper.h"
 
 #include "util/defs.h"
-#include "util/log.h"
 #include "util/mem.h"
 #include "util/winres.h"