ci: fix rust installation for windows runner

.gitea/workflows/build.yaml

@@ -13,23 +13,31 @@ jobs:
       - name: Checkout code
         uses: actions/checkout@v4
 
-      - name: Install Rust toolchain
-        uses: dtolnay/rust-toolchain@stable
+      - name: Install Rust
+        shell: pwsh
+        run: |
+          # Install rustup using the official Windows installer
+          Invoke-WebRequest -Uri "https://static.rust-lang.org/rustup/dist/x86_64-pc-windows-msvc/rustup-init.exe" -OutFile "rustup-init.exe"
+          .\rustup-init.exe -y --default-toolchain stable
+          # Add cargo to PATH for the rest of the session
+          echo "$HOME\.cargo\bin" | Out-File -FilePath $env:GITHUB_PATH -Append -Encoding utf8
 
       - name: Install LLVM
         run: choco install llvm --no-progress
 
       - name: Build Client
-        working-directory: ./client
-        run: cargo build --release
+        shell: pwsh
+        run: |
+          cd client
+          cargo build --release
 
       - name: Prepare Binaries for Installer
         shell: pwsh
         run: |
           New-Item -ItemType Directory -Force -Path bin
-          Copy-Item "client/target/release/meshvpn-client.exe" "bin/client.exe"
+          Copy-Item "client\target\release\meshvpn-client.exe" "bin\client.exe"
           # Download Wintun.dll as it is a driver binary not stored in git
-          Invoke-WebRequest -Uri "https://github.com/WireGuard/wintun/releases/latest/download/wintun.dll" -OutFile "bin/wintun.dll"
+          Invoke-WebRequest -Uri "https://github.com/WireGuard/wintun/releases/latest/download/wintun.dll" -OutFile "bin\wintun.dll"
 
       - name: Install WiX Toolset
         run: choco install wixtoolset --no-progress
@@ -39,8 +47,8 @@ jobs:
         run: |
           # candle.exe compiles .wxs to .wixobj
           # light.exe links .wixobj to .msi
-          candle.exe installer/product.wxs -o installer/product.wixobj
-          light.exe installer/product.wixobj -o meshvpn-client.msi
+          candle.exe installer\product.wxs -o installer\product.wixobj
+          light.exe installer\product.wixobj -o meshvpn-client.msi
 
       - name: Create Gitea Release
         uses: softprops/action-gh-release@v1