add github action

.github/workflows/build_exe.yml

@@ -0,0 +1,31 @@
+name: Build DBCompare Executable
+
+on:
+  push:
+    branches: [ develop ]  # actual branch name
+
+jobs:
+  build:
+    runs-on: windows-latest
+
+    steps:
+    - uses: actions/checkout@v4
+
+    - name: Set up Python
+      uses: actions/setup-python@v4
+      with:
+        python-version: '3.x'
+
+    - name: Install PyInstaller
+      run: |
+        python -m pip install --upgrade pip
+        pip install pyinstaller
+    
+    - name: Build executable
+      run: pyinstaller --name=dbcompare --onefile --windowed --add-data "img/icon.png;." --icon="img/icon.png" main.py
+
+    - name: Upload artifact
+      uses: actions/upload-artifact@v3
+      with:
+        name: dbcompare-app
+        path: dist/dbcompare.exe