Backport the Windows CI runner to 2.0.

[skip ubuntu ci]

.github/workflows/ci-windows.yml

@@ -0,0 +1,66 @@
+name: Windows CI
+on:
+  pull_request:
+  push:
+  release:
+    types:
+      - published
+jobs:
+  build:
+    if: "!contains(github.event.head_commit.message, '[skip windows ci]')"
+    runs-on: windows-2025
+    env:
+      BUILD_TYPE: ${{ github.event_name == 'release' && 'Release' || 'Debug' }}
+      CONAN_USER_HOME: ${{ github.workspace }}/win/build
+      CONAN_USER_HOME_SHORT: None
+    steps:
+      - uses: actions/checkout@v4
+
+      - name: Setup NSIS
+        run: |-
+          choco install nsis
+
+      - name: Setup MSBuild
+        uses: microsoft/setup-msbuild@v2
+
+      - name: Setup Conan
+        uses: turtlebrowser/get-conan@v1.2
+        with:
+          version: 1.66.0
+
+      - name: Try to restore libraries from the cache
+        uses: actions/cache/restore@v4
+        id: library-cache
+        with:
+          key: conan-${{ hashFiles('src/win32/conanfile.txt') }}
+          path: ${{ env.CONAN_USER_HOME }}/.conan
+
+      - name: Install libraries
+        run: |
+          conan install ${{ github.workspace }}\src\win32 --build=missing
+
+      - name: Save libraries to the cache
+        if: ${{ steps.library-cache.outputs.cache-hit != 'true' }}
+        uses: actions/cache/save@v4
+        with:
+          key:  ${{ steps.library-cache.outputs.cache-primary-key }}
+          path: ${{ env.CONAN_USER_HOME }}/.conan
+
+      - name: Run CMake
+        run: |
+          mkdir ${{ github.workspace }}\build
+          cd ${{ github.workspace }}\build
+          cmake -A x64 -D "CMAKE_BUILD_TYPE=${{ env.BUILD_TYPE }}" -G "Visual Studio 17 2022" ..
+
+      - name: Build Anope
+        working-directory: ${{ github.workspace }}\build
+        run: |
+          msbuild PACKAGE.vcxproj /M:5 /P:Configuration=${{ env.BUILD_TYPE }} /P:Platform=x64 /VERBOSITY:MINIMAL
+
+      - name: Upload installer
+        if: "${{ github.event_name == 'release' }}"
+        working-directory: ${{ github.workspace }}\build
+        env:
+          GH_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+        run: |
+          gh release upload ${{ github.event.release.tag_name }} $(Get-ChildItem anope-*.exe)