feat(deps): add dependabot action

.github/dependabot.yml

@@ -0,0 +1,26 @@
+version: 2
+updates:
+  # Maintain GitHub Actions workflows
+  - package-ecosystem: "github-actions"
+    directory: "/"
+    schedule:
+      interval: "weekly"
+    groups:
+      # Group all Actions updates into a single PR to reduce noise
+      actions:
+        patterns:
+          - "*"
+    # Limit open PRs to prevent flooding your PR tab
+    open-pull-requests-limit: 10
+
+  # Maintain Python dependencies using uv
+  - package-ecosystem: "uv"
+    directory: "/"
+    schedule:
+      interval: "weekly"
+    groups:
+      # Group all Python dependency updates into one weekly PR
+      dependencies:
+        patterns:
+          - "*"
+    open-pull-requests-limit: 10