Finish integrating custom configs

config/Readme.md

@@ -0,0 +1,40 @@
+# How to create custom configurations
+1. Create folder with name of custom configuration 
+1. Add `jabyengine_custom_config.hpp` to folder
+    1. Follow [guidelines](#jabyengine_custom_confighpp)
+1. Build JabyEngine and select your configuration
+1. Build your application and select your configuration
+
+## jabyengine_custom_config.hpp
+### Default configuration file
+```c++
+// Fix IntelliSense
+#include "../dummy_default_config.hpp"
+
+// Overwrite various configurations
+struct CustomConfiguration : public DefaultConfiguration {
+};
+
+// Define macros here
+```
+### `CustomConfiguration` options
+When overriding an option make sure to mark the function as `override`
+```c++
+struct DefaultConfiguration {
+    struct BIOSFont {
+        // VRAM position and CLUT position to load the BIOS font too
+        static constexpr GPU::PositionU16 texture_load_pos();
+        static constexpr GPU::PositionU16 CLUT_load_pos();
+    };
+
+    struct Periphery {
+        // Turns on the second controller port and enables multi tap support
+        static constexpr bool include_portB();
+        static constexpr bool use_multi_tap();
+    };
+};
+```
+### `CustomConfiguration` macros
+```c++
+#define __USE_DEBUG_COLOR__ // Turns on colored rectangles during boot
+```