Add flexible module loading and complete file embedding

- Support any folder structure (no hard-coded folders)
 - Embed all file types recursively from any folder
 - Fix require() dot-to-slash conversion for embedded modules
 - Clean build folder for fresh builds every time
 - Generate empty headers for Lua-only projects

 Backward compatible with existing projects.

scripts/build_dev.sh

@@ -62,49 +62,15 @@ fi
 mkdir -p build
 cd build || exit 1
 
-# Clean old embedded files (important for dev builds!)
-echo "Cleaning old embedded files..."
-rm -f embedded_main.h embedded_assets.h
-
-# Warn about Lua files in build directory
-LUA_COUNT=$(ls *.lua 2>/dev/null | wc -l)
-if [ "$LUA_COUNT" -gt 0 ]; then
-    echo ""
-    echo "WARNING: Found Lua files in build directory!"
-    echo "Development builds should load from file system, not embed."
-    echo ""
-    ls -1 *.lua
-    echo ""
-    read -p "Remove these files from build directory? (Y/n): " -n 1 -r
-    echo ""
-    if [[ ! $REPLY =~ ^[Nn]$ ]]; then
-        rm -f *.lua
-        echo "Lua files removed."
-    fi
-    echo ""
-fi
-
-# Warn about assets folder in build directory
-if [ -d "assets" ]; then
-    echo ""
-    echo "WARNING: Found assets folder in build directory!"
-    echo "Development builds should load from file system, not embed."
-    echo ""
-    read -p "Remove assets folder from build directory? (Y/n): " -n 1 -r
-    echo ""
-    if [[ ! $REPLY =~ ^[Nn]$ ]]; then
-        rm -rf assets
-        echo "Assets folder removed."
-    fi
-    echo ""
-fi
+# ALWAYS clean build folder for fresh build
+echo "Cleaning build directory for fresh build..."
+rm -rf ./* 2>/dev/null
+echo "✓ Build directory cleaned"
+echo ""
 
 # Clean old configuration if requested
 if [ "$1" == "clean" ]; then
-    echo "Cleaning build directory..."
-    rm -rf CMakeCache.txt CMakeFiles/ *.o *.a
-    echo "Clean complete!"
-    echo ""
+    echo "Extra clean flag detected (already cleaned)"
 fi
 
 # Detect platform and set appropriate generator