Add periodic dependency check for ampd

It will try to build the ampd binary periodically. We have some git dependencies without version fixing and that we want to maintain in that way because we are still adjusting many things and we want it to be "liquid".

.github/workflows/ampd-periodic-main-build.yml

@@ -0,0 +1,26 @@
+name: Ampd binary periodic build
+on:
+  schedule:
+    # 7 am in the morning. If there are errors due to dependencies, engineers will be notified.
+    # We are not fixing versions because everything is liquid right now.
+    - cron: "0 07 * * *"
+
+jobs:
+  build:
+    runs-on: ubuntu-latest
+    name: "Build the code"
+    steps:
+      - name: Checkout repository
+        uses: actions/checkout@v4
+
+      # Initially do not cache deps, do a fresh build from zero.
+
+      # - uses: Swatinem/rust-cache@v2
+      #   with:
+      #     cache-all-crates: true
+      #     cache-on-failure: true
+      #     workspaces: "ampd -> target"
+      #     shared-key: "ampd"
+
+      - name: Build the code
+        run: cd ampd && cargo build