Add dependabot configuration for GitHub Actions and devcontainer features

Author: ProxayFox

.github/dependabot.yml

@@ -0,0 +1,21 @@
+version: 2
+updates:
+  # Keep GitHub Actions up to date
+  - package-ecosystem: "github-actions"
+    directory: "/"
+    schedule:
+      interval: "weekly"
+    open-pull-requests-limit: 10
+    labels:
+      - "dependencies"
+      - "github-actions"
+
+  # Keep devcontainer features up to date
+  - package-ecosystem: "devcontainers"
+    directory: "/"
+    schedule:
+      interval: "weekly"
+    open-pull-requests-limit: 10
+    labels:
+      - "dependencies"
+      - "devcontainers"