[nostalgia/core] Add focusWindow, cleanup GLFW leak into Userland, change shutdown to stop main loop

src/nostalgia/core/context.hpp

@@ -26,6 +26,7 @@ class Context {
 		ox::FileSystem *rom = nullptr;
 		ox::Vector<Drawer*, 5> drawers;
 	private:
+		void *m_customData = nullptr;
 		void *m_windowerData = nullptr;
 		void *m_rendererData = nullptr;
 
@@ -36,6 +37,16 @@ class Context {
 		Context(const Context &other) noexcept = delete;
 		Context(const Context &&other) noexcept = delete;
 
+		constexpr void setCustomData(void *customData) noexcept {
+			m_customData = customData;
+		}
+
+		template<typename T>
+		[[nodiscard]]
+		constexpr T *customData() noexcept {
+			return static_cast<T*>(m_customData);
+		}
+
 		constexpr void setWindowerData(void *windowerData) noexcept {
 			m_windowerData = windowerData;
 		}