Updates dependencies and coding standards

Refreshes package dependencies to pick up latest security patches and features.

Updates the copyright to dynamically generate the current year.

Removes the copilot instructions files and adds AGENTS.md to consolidate agent guidelines.

Adds a workflow to setup .NET versions for copilot.

Author: niemyjski

.github/copilot-instructions.md

@@ -0,0 +1,29 @@
+name: "Copilot Setup"
+
+on:
+  workflow_dispatch:
+  push:
+    paths:
+      - .github/workflows/copilot-setup-steps.yml
+  pull_request:
+    paths:
+      - .github/workflows/copilot-setup-steps.yml
+
+jobs:
+  copilot-setup-steps:
+    runs-on: ubuntu-latest
+
+    permissions:
+      contents: read
+
+    steps:
+      - name: Checkout code
+        uses: actions/checkout@v6
+
+      - name: Setup .NET Core
+        uses: actions/setup-dotnet@v5
+        with:
+          dotnet-version: |
+            8.0.x
+            9.0.x
+            10.0.x