Add dependabot.yml for automated dependency updates

Author: ChrisRackauckas-Claude

.github/dependabot.yml

@@ -0,0 +1,17 @@
+version: 2
+enable-beta-ecosystems: true # Julia ecosystem
+updates:
+  - package-ecosystem: "github-actions"
+    directory: "/"
+    schedule:
+      interval: "weekly"
+  - package-ecosystem: "julia"
+    directories:
+      - "/"
+      - "/docs"
+    schedule:
+      interval: "daily"
+    groups:
+      all-julia-packages:
+        patterns:
+          - "*"