Add Lua scripting support to desktop emulator

- Created emulator-specific lua_game_emulator.cpp using filesystem instead of FatFS
- Created lua_game_loader_emulator.cpp to scan games/lua_examples directory
- Updated CMakeLists.txt to include Lua 5.4 engine and bindings
- Updated to SFML 3.0 API compatibility (event handling, sprite initialization)
- Updated Game class to use public members for Lua bindings
- Updated GameLauncher to use std::function for lambda captures
- Added continuous 60 FPS rendering for smooth display
- Emulator now loads and runs all three example Lua games

emulator/low_level_display_sfml.cpp

@@ -5,8 +5,8 @@
 #include <vector>
 
 // Add missing method implementations for emulator linkage
-bool LowLevelDisplaySFML::pollEvent(sf::Event& event) {
-    return window.pollEvent(event);
+std::optional<sf::Event> LowLevelDisplaySFML::pollEvent() {
+    return window.pollEvent();
 }
 
 void LowLevelDisplaySFML::close() {
@@ -14,18 +14,22 @@ void LowLevelDisplaySFML::close() {
 }
 
 LowLevelDisplaySFML::LowLevelDisplaySFML(int w, int h)
-    : width(w), height(h), window(sf::VideoMode(w, h), "basic1 Emulator"), framebuffer((w * h + 7) / 8, 0) {}
+    : width(w), height(h), 
+      window(sf::VideoMode({(unsigned)w, (unsigned)h}), "basic1 Emulator"),
+      framebuffer((w * h + 7) / 8, 0) {}
 
 bool LowLevelDisplaySFML::init() {
-    texture.create(width, height);
-    sprite.setTexture(texture);
+    if (!texture.resize({(unsigned)width, (unsigned)height})) {
+        return false;
+    }
+    sprite.emplace(texture);
     return window.isOpen();
 }
 
 void LowLevelDisplaySFML::draw_buffer(const uint8_t* bit_buffer) {
     // Convert 1-bit buffer to 8-bit grayscale (or RGBA) for SFML
     // Each bit in bit_buffer represents a pixel (0=black, 1=white)
-    std::vector<sf::Uint8> pixels(width * height * 4, 0);
+    std::vector<std::uint8_t> pixels(width * height * 4, 0);
     for (int y = 0; y < height; ++y) {
         for (int x = 0; x < width; ++x) {
             int bit_index = y * width + x;
@@ -33,7 +37,7 @@ void LowLevelDisplaySFML::draw_buffer(const uint8_t* bit_buffer) {
             int bit_offset = 7 - (bit_index % 8);
             bool on = (bit_buffer[byte_index] >> bit_offset) & 0x1;
             int idx = (y * width + x) * 4;
-            sf::Uint8 color = on ? 255 : 0;
+            std::uint8_t color = on ? 255 : 0;
             pixels[idx + 0] = color; // R
             pixels[idx + 1] = color; // G
             pixels[idx + 2] = color; // B
@@ -44,14 +48,10 @@ void LowLevelDisplaySFML::draw_buffer(const uint8_t* bit_buffer) {
 }
 
 void LowLevelDisplaySFML::refresh() {
-    sf::Event event;
-    while (window.pollEvent(event)) {
-        if (event.type == sf::Event::Closed)
-            window.close();
-        // TODO: Handle mouse/keyboard input here
-    }
     window.clear(sf::Color::Black);
-    window.draw(sprite);
+    if (sprite) {
+        window.draw(*sprite);
+    }
     window.display();
 }