Add nuklear ui library

engine/tests/CMakeLists.txt

@@ -1,4 +1,7 @@
 project(BreezeTests)
 
 add_executable(window_test window_test.c)
-target_link_libraries(window_test LINK_PRIVATE Breeze)
+target_link_libraries(window_test LINK_PRIVATE Breeze)
+
+add_executable(nuklear_test nuklear_test.c)
+target_link_libraries(nuklear_test LINK_PRIVATE Breeze)

engine/tests/nuklear_test.c

@@ -0,0 +1,39 @@
+#include <raylib-nuklear.h>
+
+int main() {
+    InitWindow(640, 480, "raylib-nuklear example");
+
+    // Create the Nuklear Context
+    int fontSize = 10;
+    struct nk_context *ctx = InitNuklear(fontSize);
+
+    while (!WindowShouldClose()) {
+        // Update the Nuklear context, along with input
+        UpdateNuklear(ctx);
+
+        // Nuklear GUI Code
+        // https://github.com/Immediate-Mode-UI/Nuklear/wiki/Window
+        if (nk_begin(ctx, "Nuklear", nk_rect(100, 100, 220, 220),
+                     NK_WINDOW_BORDER|NK_WINDOW_MOVABLE|NK_WINDOW_CLOSABLE)) {
+            if (nk_button_label(ctx, "Button")) {
+                // Button was clicked!
+            }
+        }
+        nk_end(ctx);
+
+        // Render
+        BeginDrawing();
+        ClearBackground(RAYWHITE);
+
+        // Render the Nuklear GUI
+        DrawNuklear(ctx);
+
+        EndDrawing();
+    }
+
+    // De-initialize the Nuklear GUI
+    UnloadNuklear(ctx);
+
+    CloseWindow();
+    return 0;
+}