Add build.bat, run.bat, and update .gitignore

build.bat

@@ -0,0 +1,43 @@
+@echo off
+setlocal enabledelayedexpansion
+
+set "SCRIPT_DIR=%~dp0"
+cd /d "%SCRIPT_DIR%"
+
+echo ========================================
+echo  MHR-CFW Go Builder
+echo ========================================
+echo.
+
+if not exist "go.mod" (
+    echo Error: go.mod not found. Make sure you are in the project directory.
+    pause
+    exit /b 1
+)
+
+echo Building mhr-cfw-go.exe...
+echo.
+
+go build -ldflags "-s -w" -o mhr-cfw-go.exe ./cmd/mhr-cfw
+
+if errorlevel 1 (
+    echo.
+    echo Build FAILED!
+    pause
+    exit /b 1
+)
+
+echo.
+echo Build successful: mhr-cfw-go.exe
+echo.
+
+if exist "ivk.ico" (
+    echo Adding icon...
+    echo Note: Icon injection requires inject_icon.exe (run separately if needed)
+)
+
+echo.
+echo ========================================
+echo  Done! Run with: mhr-cfw-go.exe
+echo ========================================
+pause