chore: add Dependabot configuration

Author: KotBehamot

.github/dependabot.yml

@@ -0,0 +1,39 @@
+version: 2
+updates:
+  # Zależności NuGet dla projektów .NET (skanuje repo od katalogu głównego w dół)
+  - package-ecosystem: "nuget"
+    directory: "/"
+    schedule:
+      interval: "weekly"
+      day: "monday"
+      time: "02:00"
+      timezone: "UTC"
+    open-pull-requests-limit: 10
+    rebase-strategy: "auto"
+    labels:
+      - "dependencies"
+      - "nuget"
+    groups:
+      nuget-minor-and-patch:
+        update-types:
+          - "minor"
+          - "patch"
+
+  # Aktualizacje workflowów GitHub Actions
+  - package-ecosystem: "github-actions"
+    directory: "/"
+    schedule:
+      interval: "weekly"
+      day: "monday"
+      time: "02:30"
+      timezone: "UTC"
+    open-pull-requests-limit: 10
+    rebase-strategy: "auto"
+    labels:
+      - "dependencies"
+      - "github-actions"
+    groups:
+      actions-minor-and-patch:
+        update-types:
+          - "minor"
+          - "patch"