Add GitHub Actions automation for test.asmln and MyPy.

Author: python-processing-unit

.github/workflows/run-tests.yml

@@ -0,0 +1,53 @@
+name: Run test.asmln and mypy
+
+on:
+  push:
+    branches:
+      - "**"
+  pull_request:
+    branches:
+      - "**"
+
+jobs:
+  test:
+    runs-on: windows-latest
+    steps:
+      - name: Checkout repository
+        uses: actions/checkout@v4
+
+      - name: Setup Python 3.14
+        uses: actions/setup-python@v4
+        with:
+          python-version: "3.14"
+
+      - name: Install numpy and mypy
+        run: |
+          python -m pip install --upgrade pip
+          pip install numpy mypy
+        shell: pwsh
+
+      - name: Run test with asm-lang.exe (if present)
+        run: |
+          if (Test-Path .\asm-lang.exe) {
+            Write-Host "Found asm-lang.exe - running .\asm-lang.exe .\test.asmln"
+            .\asm-lang.exe .\test.asmln
+          } else {
+            Write-Host "asm-lang.exe not found - skipping this step"
+          }
+        shell: pwsh
+
+      - name: Run test with asm-lang.py (if present)
+        run: |
+          if (Test-Path .\asm-lang.py) {
+            Write-Host "Found asm-lang.py - running python .\asm-lang.py .\test.asmln"
+            python .\asm-lang.py .\test.asmln
+          } else {
+            Write-Host "asm-lang.py not found - skipping this step"
+          }
+        shell: pwsh
+
+      - name: Run mypy on selected files
+        run: |
+          Write-Host "Running mypy on: .\asm-lang.py .\ext\gui.py .\ext\image.py .\ext\networking.py .\ext\win32.py"
+          python -m mypy --show-error-codes .\asm-lang.py .\ext\gui.py .\ext\image.py .\ext\networking.py .\ext\win32.py
+        shell: pwsh