GitHub Actions: add test workflow

.github/workflows/wallet-admin-test.yml

@@ -0,0 +1,26 @@
+# This is a basic workflow to help you get started with Actions
+
+name: CI - test
+
+# Controls when the workflow will run
+on:
+  # Allows you to run this workflow manually from the Actions tab
+  workflow_dispatch:
+
+# A workflow run is made up of one or more jobs that can run sequentially or in parallel
+jobs:
+  # This workflow contains a single job called "build"
+  build:
+    # The type of runner that the job will run on
+    runs-on: ubuntu-latest
+
+    # Steps represent a sequence of tasks that will be executed as part of the job
+    steps:
+      # Checks-out your repository under $GITHUB_WORKSPACE, so your job can access it
+      - uses: actions/checkout@v3
+
+      # Runs a single command using the runners shell
+      - name: Run a one-line script
+        env:
+          ADMIN_ADDRESS: ${{ secrets.WALLET_ADMIN_ADDRESS }}
+        run: echo $ADMIN_ADDRESS