ci: add downstream-ci reusable workflow

.github/workflows/ci.yml

@@ -0,0 +1,31 @@
+name: ci
+
+on:
+  # Trigger the workflow on push to master or develop, except tag creation
+  push:
+    branches:
+      - 'master'
+      - 'develop'
+    tags-ignore:
+      - '**'
+
+  # Trigger the workflow on pull request
+  pull_request: ~
+
+  # Trigger the workflow manually
+  workflow_dispatch: ~
+
+  # Trigger after public PR approved for CI
+  pull_request_target:
+    types: [labeled]
+
+jobs:
+  # Run CI including downstream packages on self-hosted runners
+  downstream-ci:
+    name: downstream-ci
+    if: ${{ !github.event.pull_request.head.repo.fork && github.event.action != 'labeled' || github.event.label.name == 'approved-for-ci' }}
+    uses: ecmwf-actions/downstream-ci/.github/workflows/downstream-ci.yml@add-anemoi-datasets
+    with:
+      anemoi-datasets: ecmwf/anemoi-datasets@${{ github.event.pull_request.head.sha || github.sha }}
+      codecov_upload: true
+    secrets: inherit