Devtools - Shader editing (#1705)

* devtools: shader editing and compiling

* devtools: patch shader at runtime

* devtools: shader editing load patch even with config disabled

src/sdl_window.h

@@ -41,6 +41,8 @@ struct WindowSystemInfo {
 };
 
 class WindowSDL {
+    int keyboard_grab = 0;
+
 public:
     explicit WindowSDL(s32 width, s32 height, Input::GameController* controller,
                        std::string_view window_title);
@@ -69,6 +71,9 @@ public:
     void WaitEvent();
     void InitTimers();
 
+    void RequestKeyboard();
+    void ReleaseKeyboard();
+
 private:
     void OnResize();
     void OnKeyPress(const SDL_Event* event);