chore(.github): add dependabot.yml for weekly dependency updates

Add dependabot configuration to automate weekly updates of GitHub Actions and pip packages.

New Features
- Add Dependabot configuration for GitHub Actions and pip ecosystems with weekly schedule.

Enhancements
-

Bug Fixes
-

.github/dependabot.yml

@@ -0,0 +1,16 @@
+version: 2
+updates:
+  - package-ecosystem: "github-actions"
+    directory: "/"
+    schedule:
+      interval: "weekly"
+    target-branch: "main"
+    rebase-strategy: "auto"
+
+  - package-ecosystem: "pip"
+    directory: "/"
+    schedule:
+      interval: "weekly"
+    target-branch: "main"
+    rebase-strategy: "auto"
+    open-pull-requests-limit: 10