CI: test-msvc workflow -- web-runner + dotnet on the MSVC toolchain

Try et-ws-web-runner (and dotnet-data1) on x86_64-pc-windows-msvc, where v8 uses denolands MSVC
prebuilt (no gnullvm fork, no gnullvm C++ exception-unwind bug) -- so the proven-valid .NET module
should run. Does not use mise: Rust/.NET/NASM via actions, dotnet module built with raw dotnet
commands; MISE_ENV=dotnet only gates the web-runner test to skip non-dotnet modules. Runs on push.
All other workflows renamed *.yaml.disabled so only this one runs while iterating.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

Author: jayvdb

.github/workflows/check.yaml .github/workflows/check.yaml.disabled.github/workflows/check.yaml renamed to .github/workflows/check.yaml.disabled

@@ -0,0 +1,67 @@
+---
+name: test-msvc
+
+# Experiment: run et-ws-web-runner (and the .NET dotnet-data1 module) on Windows using the native MSVC
+# toolchain. On x86_64-pc-windows-msvc the v8 crate uses denoland's MSVC prebuilt -- no gnullvm fork and no
+# gnullvm C++ exception-unwind bug -- so the (proven-valid) dotnet module should actually run.
+#
+# Deliberately does NOT use mise: Rust, .NET and NASM are installed via actions and the dotnet module is built
+# with raw `dotnet` commands. MISE_ENV=dotnet is set only when running the web-runner test, so the test's
+# `mise_env_includes()` skips every non-dotnet module (the gate reads the MISE_ENV env var directly).
+#
+# Runs on push until the web runner is green on MSVC.
+"on":
+  push:
+
+permissions:
+  contents: read
+
+jobs:
+  web-runner-msvc:
+    runs-on: windows-latest
+    timeout-minutes: 90
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v4
+        with:
+          fetch-depth: 1
+          persist-credentials: false
+
+      - name: Install Rust (x86_64-pc-windows-msvc)
+        uses: dtolnay/rust-toolchain@stable
+
+      - name: Install NASM
+        # aws-lc-sys (deno_node_crypto -> ... -> aws-lc-sys) assembles BoringSSL's x86_64 .asm with NASM.
+        uses: ilammy/setup-nasm@v1
+
+      - name: Install .NET SDK
+        uses: actions/setup-dotnet@v4
+        with:
+          dotnet-version: "10.0.300"
+
+      - name: Build dotnet-data1 WASM module
+        shell: bash
+        run: |
+          set -xeuo pipefail
+          cd services/ws-modules/dotnet-data1
+          dotnet workload install wasm-tools --skip-manifest-update
+          # MSBuild's BrowserWasmApp.targets link step calls bare `emcc` and relies on PATH; surface the
+          # workload's emcc dir + EmscriptenLocation ourselves (same approach as the mise build task).
+          packs="${DOTNET_ROOT:-/c/Program Files/dotnet}/packs"
+          emcc_bat="$(find "$packs" -name emcc.bat 2>/dev/null | head -1)"
+          if [ -z "$emcc_bat" ]; then
+            emcc_bat="$(find "/c/Program Files/dotnet/packs" -name emcc.bat 2>/dev/null | head -1)"
+          fi
+          test -n "$emcc_bat" || { echo "emcc.bat not found under dotnet packs"; exit 1; }
+          emcc_dir="$(dirname "$emcc_bat")"
+          emsdk_loc="$(dirname "$(dirname "$emcc_dir")")/Sdk"
+          export PATH="$(cygpath -u "$emcc_dir"):$PATH"
+          dotnet publish -c Release -p:EmscriptenLocation="$(cygpath -w "$emsdk_loc")"
+          publish=bin/Release/net10.0/publish/wwwroot/_framework
+          cp "$publish"/*.js "$publish"/*.wasm "$publish"/*.dat pkg/
+
+      - name: Run web-runner dotnet-data1 test
+        shell: bash
+        env:
+          MISE_ENV: dotnet
+        run: cargo test -p et-ws-web-runner module_runs_successfully::case_4_dotnet_data1 -- --nocapture