chore: publish artifacts on GitHub

.github/workflows/upload.yml

@@ -0,0 +1,35 @@
+name: Upload Artifacts
+
+on:
+  push:
+
+jobs:
+  hydra-build:
+    runs-on: ubuntu-latest
+
+    steps:
+      - uses: actions/checkout@v4
+
+      - uses: DeterminateSystems/nix-installer-action@main
+        with:
+          extra-conf: |
+            substituters = https://cache.nixos.org https://cache.iog.io
+            trusted-public-keys = cache.nixos.org-1:6NCHdD59X431o0gWypbMrAURkbJ16ZPMQFGspcDShjY= hydra.iohk.io:f/Ea+s+dFdN+3Y/G+FDgSq+a5NEWhJGzdjvKNGv0/EQ=
+
+      - name: Wait for Hydra
+        uses: input-output-hk/actions/wait-for-hydra@latest
+        with:
+          check: "ci/hydra-build:required"
+
+      - name: Download Artifacts from Hydra
+        run: |
+          nix build --builders "" --max-jobs 0 .#hydraJobs.testgen-hs.x86_64-linux   && cp result/testgen-hs-*.* .
+          nix build --builders "" --max-jobs 0 .#hydraJobs.testgen-hs.x86_64-widows  && cp result/testgen-hs-*.* .
+          nix build --builders "" --max-jobs 0 .#hydraJobs.testgen-hs.x86_64-darwin  && cp result/testgen-hs-*.* .
+          nix build --builders "" --max-jobs 0 .#hydraJobs.testgen-hs.aarch64-darwin && cp result/testgen-hs-*.* .
+
+      - name: Upload Artifacts
+        uses: actions/upload-artifact@v3
+        with:
+          name: hydra-artifacts
+          path: testgen-hs-*.*