ci: add cygwin badges

.github/workflows/cyg-auto.yml

@@ -0,0 +1,31 @@
+name: cyg auto
+
+on:
+  push:
+    branches: [ develop ]
+
+jobs:
+  test:
+    name: "cyg auto"
+    runs-on: windows-latest
+    steps:
+      - name: Set git to use LF
+        run: |
+          git config --global core.autocrlf input
+
+      - uses: actions/checkout@v4
+
+      - name: Install Cygwin
+        uses: cygwin/cygwin-install-action@master
+        with:
+          packages: cmake gcc-fortran make ninja perl zlib-devel
+      - name: Test HDF5
+        run: |
+          export PATH=/usr/bin:$PATH
+          ./autogen.sh
+          ./configur
+          make
+          make check
+          make install
+          make uninstall
+        shell: C:\cygwin\bin\bash.exe -eo pipefail -o igncr '{0}'