chore: add dependabot

.github/dependabot.yml

@@ -0,0 +1,40 @@
+version: 2
+updates:
+  # Enable version updates for Python dependencies
+  - package-ecosystem: "pip"
+    directory: "/"
+    schedule:
+      interval: "weekly"
+    cooldown:
+      default-days: 3
+      semver-major-days: 30
+      semver-minor-days: 7
+      semver-patch-days: 3
+    open-pull-requests-limit: 10
+    labels:
+      - "dependencies"
+      - "python"
+    # Group updates for development dependencies
+    groups:
+      dev-dependencies:
+        patterns:
+          - "ruff*"
+          - "mypy*"
+          - "basedpyright*"
+          - "types-*"
+          - "zizmor*"
+
+  # Enable version updates for GitHub Actions
+  - package-ecosystem: "github-actions"
+    directory: "/"
+    schedule:
+      interval: "weekly"
+    cooldown:
+      default-days: 3
+      semver-major-days: 30
+      semver-minor-days: 7
+      semver-patch-days: 3
+    open-pull-requests-limit: 5
+    labels:
+      - "dependencies"
+      - "github-actions"