WIP: Add a workflow to create cache periodically

.github/workflows/create-cache-periodically.yml

@@ -0,0 +1,47 @@
+name: Create cache periodically
+
+on:
+  schedule:
+    # NOTE:
+    # The cache is valid for 7 days,
+    # so if we recreate the cache every 6 days,
+    # the cache will never become invalid.
+    # (c.f. https://docs.github.com/en/actions/using-workflows/caching-dependencies-to-speed-up-workflows#usage-limits-and-eviction-policy)
+    - cron: "0 0 */6 * *"
+
+  workflow_dispatch:
+
+env:
+  otp: 26.0
+  rebar3: 3.22.1
+
+jobs:
+  test:
+    runs-on: ubuntu-22.04
+
+    steps:
+      - uses: actions/checkout@v4
+      - uses: erlef/setup-beam@v1
+        with:
+          otp-version: ${{ env.otp }}
+          rebar3-version: ${{ env.rebar3 }}
+      - uses: actions/cache/restore@v4
+        id: cache-restore
+        with:
+          path: |
+            ~/.cache/rebar3
+            _build
+          key: ${{ runner.os }}-otp-${{ env.otp }}-rebar3-${{ env.rebar3 }}-${{ hashFiles('rebar.lock') }}
+
+      # NOTE: Create cache data
+      - run: rebar3 compile
+      - run: rebar3 as test compile
+      - run: rebar3 dialyzer
+
+      - uses: actions/cache/save@v4
+        if: always()
+        with:
+          path: |
+            ~/.cache/rebar3
+            _build
+          key: ${{ steps.cache-restore.outputs.cache-primary-key }}