Add CI workflow for devnet account deployment

Runs deploy-account::devnet on pushes and PRs to next/dev branches.
No local network or Aztec CLI needed since it targets the remote devnet.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

Author: critesjosh

.github/workflows/devnet.yaml

@@ -0,0 +1,36 @@
+name: Devnet Tests
+
+on:
+  push:
+    branches:
+      - next
+      - dev
+  pull_request:
+    branches:
+      - next
+      - dev
+  workflow_dispatch:
+
+jobs:
+  devnet-deploy-account:
+    name: Deploy Account to Devnet
+    runs-on: ubuntu-latest
+    env:
+      AZTEC_ENV: devnet
+      AZTEC_VERSION: 4.0.0-devnet.2-patch.1
+
+    steps:
+      - name: Checkout repository
+        uses: actions/checkout@v5
+
+      - name: Set up Node.js
+        uses: actions/setup-node@v4
+        with:
+          node-version: "22"
+          cache: "yarn"
+
+      - name: Install project dependencies
+        run: yarn
+
+      - name: Deploy account to devnet
+        run: yarn deploy-account::devnet