Add Dependabot configuration for all .NET solutions

Co-authored-by: jongalloway <[email protected]>

Author: Copilot

.github/dependabot.yml

@@ -0,0 +1,57 @@
+version: 2
+updates:
+  # 02-SetupDevEnvironment
+  - package-ecosystem: "nuget"
+    directory: "/02-SetupDevEnvironment/src"
+    schedule:
+      interval: "weekly"
+      day: "monday"
+    target-branch: "main"
+
+  # 03-CoreGenerativeAITechniques
+  - package-ecosystem: "nuget"
+    directory: "/03-CoreGenerativeAITechniques/src"
+    schedule:
+      interval: "weekly"
+      day: "monday"
+    target-branch: "main"
+
+  # 04-PracticalSamples
+  - package-ecosystem: "nuget"
+    directory: "/04-PracticalSamples/src"
+    schedule:
+      interval: "weekly"
+      day: "monday"
+    target-branch: "main"
+
+  # 05-AppCreatedWithGenAI - HFMCP.GenImage
+  - package-ecosystem: "nuget"
+    directory: "/05-AppCreatedWithGenAI/HFMCP.GenImage"
+    schedule:
+      interval: "weekly"
+      day: "monday"
+    target-branch: "main"
+
+  # 05-AppCreatedWithGenAI - SpaceAINet
+  - package-ecosystem: "nuget"
+    directory: "/05-AppCreatedWithGenAI/SpaceAINet"
+    schedule:
+      interval: "weekly"
+      day: "monday"
+    target-branch: "main"
+
+  # 09-ResponsibleGenAI (in case future .NET projects are added)
+  - package-ecosystem: "nuget"
+    directory: "/09-ResponsibleGenAI"
+    schedule:
+      interval: "weekly"
+      day: "monday"
+    target-branch: "main"
+
+  # 01-IntroToGenAI (in case future .NET projects are added)
+  - package-ecosystem: "nuget"
+    directory: "/01-IntroToGenAI"
+    schedule:
+      interval: "weekly"
+      day: "monday"
+    target-branch: "main"