🔧 chore(dependabot): add default configuration

.github/dependabot.yaml

@@ -0,0 +1,23 @@
+version: 2
+
+updates:
+  # Maintain dependencies for GitHub Actions
+  - package-ecosystem: github-actions
+    directory: .github/workflows
+    schedule:
+      interval: monthly
+    commit-message:
+      prefix: ":arrow_up: ci(dependencies)"
+      include: "full"
+
+  # Maintain dependencies for Composer
+  - package-ecosystem: composer
+    directory: /
+    schedule:
+      interval: daily
+    commit-message:
+      prefix: ":arrow_up: chore(package)"
+      include: "full"
+    labels:
+      - dependencies
+    open-pull-requests-limit: 0