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

games/lua_examples/ball.lua

@@ -14,6 +14,9 @@ function init()
     game.vars.radius = 10
     game.vars.frame_count = 0
     
+    -- Enable continuous frame updates for smooth animation
+    game.set_frame_updates(true)
+    
     print("Bouncing Ball initialized")
 end
 
@@ -28,8 +31,8 @@ function update(event)
         return true
     end
     
-    -- Update physics if running
-    if game.vars.state == STATE_RUNNING then
+    -- Update physics if running (on any frame tick)
+    if event.type == INPUT.FRAME_TICK and game.vars.state == STATE_RUNNING then
         -- Move ball
         game.vars.ball_x = game.vars.ball_x + game.vars.vel_x
         game.vars.ball_y = game.vars.ball_y + game.vars.vel_y