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

emulator/game.h

@@ -15,6 +15,7 @@ public:
     virtual bool update(const InputEvent& event) = 0;
     virtual void draw() = 0;
     virtual bool wants_to_exit() const { return false; }
+    virtual bool wants_frame_updates() const { return false; }
     
     // Public members for Lua bindings access
     uint16_t width;

emulator/lua_game_emulator.cpp

@@ -171,7 +171,17 @@ bool LuaGame::wants_to_exit() const {
     
     return exit;
 }
-
+bool LuaGame::wants_frame_updates() const {
+    if (!L) return false;
+    
+    // Check registry for frame updates flag
+    lua_pushstring(L, "__wants_frame_updates");
+    lua_gettable(L, LUA_REGISTRYINDEX);
+    bool wants_updates = lua_toboolean(L, -1);
+    lua_pop(L, 1);
+    
+    return wants_updates;
+}
 bool LuaGame::call_lua_function(const char* func_name, int nargs, int nresults) {
     int result = lua_pcall(L, nargs, nresults, 0);
     if (result != LUA_OK) {

emulator/main.cpp

@@ -107,6 +107,17 @@ int main() {
                     needs_redraw = true;
                 }
             }
+        } else if (launcher.is_game_selected()) {
+            // No user input, but check if game wants frame tick updates
+            current_game = launcher.get_selected_game();
+            if (current_game->wants_frame_updates()) {
+                InputEvent frame_event = {INPUT_FRAME_TICK, 0, 0, 0, 0, 0, true};
+                needs_redraw = current_game->update(frame_event) || needs_redraw;
+                if (current_game->wants_to_exit()) {
+                    launcher.reset();
+                    needs_redraw = true;
+                }
+            }
         }
 
         // Always redraw every frame for emulator