Add Dependabot configuration for multiple ecosystems

Configured Dependabot for multiple package ecosystems including NuGet, NPM, Python, Maven, and GitHub Actions with daily and weekly update schedules.

Author: ankitha39

.github/dependabot.yml

@@ -0,0 +1,73 @@
+version: 2
+updates:
+  # ============================================
+  # .NET/NuGet Dependencies
+  # ============================================
+  - package-ecosystem: "nuget"
+    directory: "/"
+    schedule:
+      interval: "daily"  # Check daily for security updates
+      time: "09:00"      # At 9 AM UTC
+    open-pull-requests-limit: 10
+    labels:
+      - "dependencies"
+      - "security"
+      - "automated"
+    commit-message:
+      prefix: "chore(deps)"
+      include: "scope"
+    # Grouping updates (reduces PR spam)
+    groups:
+      production-dependencies:
+        patterns:
+          - "*"
+        exclude-patterns:
+          - "*test*"
+          - "*dev*"
+
+  # ============================================
+  # NPM Dependencies (if you have JavaScript)
+  # ============================================
+  - package-ecosystem: "npm"
+    directory: "/"
+    schedule:
+      interval: "daily"
+    open-pull-requests-limit: 10
+    labels:
+      - "dependencies"
+      - "javascript"
+
+  # ============================================
+  # Python Dependencies (if you have Python)
+  # ============================================
+  - package-ecosystem: "pip"
+    directory: "/"
+    schedule:
+      interval: "daily"
+    open-pull-requests-limit: 10
+    labels:
+      - "dependencies"
+      - "python"
+
+  # ============================================
+  # Java/Maven (if you have Java)
+  # ============================================
+  - package-ecosystem: "maven"
+    directory: "/"
+    schedule:
+      interval: "daily"
+    open-pull-requests-limit: 10
+    labels:
+      - "dependencies"
+      - "java"
+
+  # ============================================
+  # GitHub Actions (IMPORTANT!)
+  # ============================================
+  - package-ecosystem: "github-actions"
+    directory: "/"
+    schedule:
+      interval: "weekly"
+    labels:
+      - "dependencies"
+      - "github-actions"