Test new windows runner

Author: JoeTurki

.github/workflows/test-mdns-windows.yml

@@ -0,0 +1,59 @@
+# SPDX-FileCopyrightText: 2023 The Pion community <https://pion.ly>
+# SPDX-License-Identifier: MIT
+
+name: Test Windows with mDNS
+
+on:
+  push:
+    branches: [ main, master ]
+  pull_request:
+    branches: [ main, master ]
+  workflow_dispatch:
+
+permissions:
+  contents: read
+
+jobs:
+  test-windows-mdns:
+    runs-on: windows-latest
+    name: Go Windows with mDNS
+    steps:
+      - uses: actions/checkout@v5
+
+      - name: Set up Go
+        uses: actions/setup-go@v4
+        with:
+          go-version: '1.21'
+
+      - uses: actions/cache@v4
+        with:
+          path: |
+            ~/go/pkg/mod
+            ~/.cache
+          key: ${{ runner.os }}-windows-go-${{ hashFiles('**/go.sum') }}
+          restore-keys: ${{ runner.os }}-windows-go-
+
+      - name: Enable mDNS on Windows
+        shell: cmd
+        run: |
+          reg add "HKLM\SYSTEM\CurrentControlSet\Services\Dnscache\Parameters" /v EnableMDNS /t REG_DWORD /d 1 /f
+          netsh advfirewall firewall add rule name="Allow mDNS Inbound" dir=in action=allow protocol=UDP localport=5353
+          netsh advfirewall firewall add rule name="Allow mDNS Outbound" dir=out action=allow protocol=UDP localport=5353
+          net stop Dnscache
+          net start Dnscache
+          timeout /t 5 /nobreak
+          echo [Verification]
+          reg query "HKLM\SYSTEM\CurrentControlSet\Services\Dnscache\Parameters" /v EnableMDNS
+          netstat -an | findstr ":5353"
+
+      - name: Run all tests
+        run: go test -v ./...
+
+      - name: Run mDNS tests specifically
+        run: go test -v -run TestMulticastDNS
+
+      - name: Run timing-sensitive tests
+        run: |
+          go test -v -run TestInvalidAgentStarts
+          go test -v -run TestAcceptAggressiveNomination
+          go test -v -run TestActiveTCP