Add requirements folder with dependencies list and build action

.github/workflows/build_exe.yml

@@ -0,0 +1,37 @@
+name: Build DLL Injector GUI EXE
+
+on:
+  push:
+    branches:
+      - main
+  pull_request:
+    branches:
+      - main
+
+jobs:
+  build:
+    runs-on: windows-latest
+
+    steps:
+    - uses: actions/checkout@v2
+
+    - name: Set up Python
+      uses: actions/setup-python@v2
+      with:
+        python-version: '3.x'
+
+    - name: Install dependencies
+      run: |
+        python -m pip install --upgrade pip
+        pip install -r ./QT/requirements.txt
+
+    - name: Build EXE with PyInstaller
+      run: |
+        pip install pyinstaller
+        pyinstaller --onefile --windowed ./QT/dll-injector-gui.py
+
+    - name: Upload EXE as Artifact
+      uses: actions/upload-artifact@v2
+      with:
+        name: dll-injector-gui-exe
+        path: ./dist/dll-injector-gui.exe

QT/requirements.txt

@@ -0,0 +1,3 @@
+PyQt5
+psutil
+pyinjector