Add frame tick system for continuous animation

- Added INPUT_FRAME_TICK event type to input_event.h
- Added wants_frame_updates() virtual method to Game base class
- Implemented frame tick logic in main loop (basic1.cpp and emulator/main.cpp)
- Added Lua bindings: game.set_frame_updates(bool) and INPUT.FRAME_TICK
- Updated LuaGame to support frame updates via registry flag
- Updated ball.lua to use continuous frame updates for smooth animation
- Both hardware and emulator now support continuous animation for physics/games

basic1.cpp

@@ -520,6 +520,14 @@ int main()
                 }
                 needs_refresh = true;
             }
+        } else if (launcher.is_game_selected()) {
+            // No input, but check if game wants continuous updates
+            current_game = launcher.get_selected_game();
+            if (current_game->wants_frame_updates()) {
+                // Send frame tick event for animation/physics updates
+                InputEvent frame_tick = {INPUT_FRAME_TICK, 0, 0, 0, 0, 0, true};
+                needs_refresh = current_game->update(frame_tick);
+            }
         }
         
         // 4. Redraw and queue async refresh on Core 1