ksys/res: Implement more ResourceMgrTask and OverlayArena functions

src/KingSystem/Resource/resSystem.cpp

@@ -10,8 +10,12 @@ bool returnFalse() {
     return false;
 }
 
-bool returnFalse2() {
+bool returnFalse2(const sead::SafeString&) {
     return false;
 }
 
+s32 getDefaultAlignment() {
+    return 8;
+}
+
 }  // namespace ksys::res