JSystem Font classes, SComponent cBgW (#14)

* c_bg_w.cpp OK

* JUTFont and JUTResFont partially implemented

Co-authored-by: notyouraveragehooman <65437533+notyouraveragehooman@users.noreply.github.com>
Co-authored-by: Pheenoh <pheenoh@gmail.com>

include/SComponent/c_bg_w.h

@@ -0,0 +1,25 @@
+#ifndef SCOMPONENT_C_BG_W_H
+#define SCOMPONENT_C_BG_W_H
+
+#include "global.h"
+
+class cBgW_BgId {
+public:
+    void Regist(int a1);
+    void Release();
+
+    unsigned int ChkUsed() const;
+
+private:
+    unsigned short mId;
+};
+
+extern "C" {
+
+bool cBgW_CheckBGround(float a1);
+bool cBgW_CheckBRoof(float a1);
+bool cBgW_CheckBWall(float a1);
+
+}  // extern "C"
+
+#endif