Change UUID to WUUID

Windows defines a UUID struct that causes clashes

src/uuid/uuid.h

@@ -15,8 +15,8 @@ BEGIN_C_LINKAGE
 #define WAPP_UUID_SPEC WAPP_STR8_SPEC
 #define wapp_uuid_varg(UUID) wapp_str8_varg((UUID).uuid)
 
-typedef struct uuid UUID;
-struct uuid {
+typedef struct wapp_uuid WUUID;
+struct wapp_uuid {
   Str8 uuid;
 };
 
@@ -28,7 +28,7 @@ struct uuid {
 
 // Just returns the same pointer that was passed in with the UUID initialised.
 // Fails when passed a NULL pointer.
-UUID *wapp_uuid_init_uuid4(UUID *uuid);
+WUUID *wapp_uuid_init_uuid4(WUUID *uuid);
 
 #ifdef WAPP_PLATFORM_CPP
 END_C_LINKAGE