add workflow to check mocks are up-to-date

.github/workflows/check-mocks.yml

@@ -0,0 +1,32 @@
+name: check mocks up-to-date
+on:
+  push:
+    branches:
+      - master
+  pull_request:
+
+permissions:
+  contents: read
+
+jobs:
+  make-mocks:
+    name: make mocks
+    runs-on: ubuntu-latest
+    steps:
+      - name: checkout EigenCert
+        uses: actions/checkout@v4
+
+      - name: install go1.21
+        uses: actions/setup-go@v5
+        with:
+          go-version: '1.21'
+
+      - name: run make mocks
+        run: |
+                make mocks
+                if [ ! -z "$(git status --porcelain)" ]; then
+                  printf "Current generated mocks not up to date\n"
+                  git diff
+                  git status
+                  exit 1
+                fi