Produce a "nightly" release on every push.

.github/workflows/build.yml

@@ -6,6 +6,11 @@ jobs:
 
   build:
     runs-on: windows-2022
+
+    permissions:
+      id-token: write
+      contents: write   # This is required to create/push the new git tag
+
     steps:
     - uses: actions/checkout@v4
       with:
@@ -43,3 +48,21 @@ jobs:
       with:
         path: build/Release/libpresage.dll
         name: libpresage.dll
+
+    - name: Prepare Release Info
+      run: |
+        $COMMIT_DATE = (git log -1 --date=format:'%Y%m%d' --format='%ad')
+        echo "COMMIT_DATE=$COMMIT_DATE" | Out-File -FilePath $Env:GITHUB_ENV -Append
+        [string](Get-Content "src\rust\Cargo.toml") -match 'presage = [^}]+rev = \"([a-f0-9]+)\"' | Out-Null
+        $PRESAGE_REVISION = $matches[1]
+        echo "PRESAGE_REVISION=$PRESAGE_REVISION" | Out-File -FilePath $Env:GITHUB_ENV -Append
+
+    - name: Create Release
+      uses: ncipollo/release-action@v1
+      with:
+        artifacts: build/Release/libpresage.dll
+        tag: nightly-${{ env.COMMIT_DATE }}-${{ env.PRESAGE_REVISION }}
+        #name: Nightly ${{ github.sha }}
+        allowUpdates: true
+        artifactErrorsFailBuild: true
+        makeLatest: true