chore: add dependabot cooldown and grouped updates

Author: Copilot

.github/dependabot.yml

@@ -4,8 +4,21 @@ updates:
     directory: /
     schedule:
       interval: daily
+    cooldown:
+      default-days: 3
+    groups:
+      actions:
+        patterns:
+          - "*"
 
   - package-ecosystem: npm
     directory: /
     schedule:
       interval: daily
+    cooldown:
+      default-days: 3
+    groups:
+      production-dependencies:
+        dependency-type: "production"
+      development-dependencies:
+        dependency-type: "development"

.github/workflows/test.yml

@@ -12,7 +12,7 @@ jobs:
     steps:
       - uses: actions/checkout@v4
       - run: |
-          npm install
+          npm ci
       - run: |
           npm run all
   test: # make sure the action works on a clean machine without building