Add build scripts and Windows icon/resources

Added:
- build_dev.bat / build_dev.sh - Development build scripts
- build_release.bat / build_release.sh - Release build scripts with embedding
- icon.ico - Default Windows icon for executable
- resources.rc - Windows resource file for icon and exe metadata
- BUILD_SCRIPTS.md - Complete documentation for build scripts

Features:
- Automated development builds (no embedding, fast iteration)
- Automated release builds (with Lua and asset embedding)
- Interactive verification and cleanup
- Custom icon and version info in Windows executables
- Cross-platform scripts (Windows .bat and Unix .sh)
- Safety checks and helpful messages

The build scripts provide one-command building for both development
and release workflows, with clear instructions and progress feedback.

resources.rc

@@ -0,0 +1,30 @@
+IDI_ICON1 ICON "icon.ico"
+
+1 VERSIONINFO
+FILEVERSION 1,0,0,0
+PRODUCTVERSION 1,0,0,0
+FILEFLAGSMASK 0x3fL
+FILEFLAGS 0x0L
+FILEOS 0x40004L
+FILETYPE 0x1L
+FILESUBTYPE 0x0L
+BEGIN
+    BLOCK "StringFileInfo"
+    BEGIN
+        BLOCK "040904b0"
+        BEGIN
+            VALUE "CompanyName", "Reilua and Indrajith K L"
+            VALUE "FileDescription", "Made using ReiLua"
+            VALUE "FileVersion", "1.0.0.0"
+            VALUE "InternalName", "ReiLua"
+            VALUE "LegalCopyright", "Copyright (C) ReiLua and Indrajith K L, 2025"
+            VALUE "OriginalFilename", "ReiLua.exe"
+            VALUE "ProductName", "My Awesome Game"
+            VALUE "ProductVersion", "1.0.0.0"
+        END
+    END
+    BLOCK "VarFileInfo"
+    BEGIN
+        VALUE "Translation", 0x409, 1200
+    END
+END