Configure Dependabot for Rust and GitHub Actions

Added configuration for Rust and GitHub Actions updates.

Author: Jeremis70

.github/dependabot.yml

@@ -0,0 +1,39 @@
+version: 2
+updates:
+  # Rust crates (Cargo.toml / Cargo.lock)
+  - package-ecosystem: "cargo"
+    directory: "/"
+    schedule:
+      interval: "weekly"
+      day: "sunday"
+      time: "09:00"
+    open-pull-requests-limit: 5
+    labels: ["dependencies", "rust"]
+    assignees: []
+    reviewers: []
+    groups:
+      # Keep noisy patch/minor bumps together
+      rust-patch-minor:
+        applies-to: version-updates
+        update-types:
+          - "minor"
+          - "patch"
+      # Security fixes grouped separately if you want clarity
+      rust-security:
+        applies-to: security-updates
+        patterns:
+          - "*"
+
+  # GitHub Actions versions (checkout@v4 etc.)
+  - package-ecosystem: "github-actions"
+    directory: "/"
+    schedule:
+      interval: "weekly"
+      day: "sunday"
+      time: "09:10"
+    open-pull-requests-limit: 3
+    labels: ["dependencies", "github-actions"]
+    groups:
+      gha-all:
+        patterns:
+          - "*"