Feature/intgerate reusable workflows (#2)

* ci: add public pr label

* ci: add downstream ci

* ci: readthedocs update check

* ci: trigger ci on main

* ci: call main of downstream ci

.github/workflows/ci.yml

@@ -0,0 +1,40 @@
+name: ci
+
+on:
+  # Trigger the workflow on push to master or develop, except tag creation
+  push:
+    branches:
+      - 'main'
+      - 'develop'
+    tags-ignore:
+      - '**'
+
+  # Trigger the workflow on pull request
+  pull_request: ~
+
+  # Trigger the workflow manually installs
+  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: ${{ !github.event.pull_request.head.repo.fork && github.event.action != 'labeled' || github.event.label.name == 'approved-for-ci' }}
+    uses: ecmwf-actions/downstream-ci/.github/workflows/downstream-ci.yml@main
+    with:
+      anemoi-utils: ecmwf/anemoi-utils@${{ github.event.pull_request.head.sha || github.sha }}
+      codecov_upload: true
+    secrets: inherit
+
+   # Build downstream packages on HPC
+  downstream-ci-hpc:
+    name: downstream-ci-hpc
+    if: ${{ !github.event.pull_request.head.repo.fork && github.event.action != 'labeled' || github.event.label.name == 'approved-for-ci' }}
+    uses: ecmwf-actions/downstream-ci/.github/workflows/downstream-ci.yml@main
+    with:
+      anemoi-utils: ecmwf/anemoi-utils@${{ github.event.pull_request.head.sha || github.sha }}
+    secrets: inherit

.github/workflows/label-public-pr.yml

@@ -0,0 +1,10 @@
+# Manage labels of pull requests that originate from forks
+name: label-public-pr
+
+on:
+  pull_request_target:
+    types: [opened, synchronize]
+
+jobs:
+  label:
+    uses: ecmwf-actions/reusable-workflows/.github/workflows/label-pr.yml@v2

.github/workflows/readthedocs-pr-update.yml

@@ -0,0 +1,22 @@
+name: Read the Docs PR Preview
+on:
+  pull_request_target:
+    types:
+      - opened
+      - synchronize
+      - reopened
+    # Execute this action only on PRs that touch
+    # documentation files.
+    paths:
+      - "docs/**"
+
+permissions:
+  pull-requests: write
+
+jobs:
+  documentation-links:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: readthedocs/actions/preview@v1
+        with:
+          project-slug: "anemoi-utils"