feat(loader): check for wsc service before starting

defendnot-loader/core/ensure_environment.cpp

@@ -0,0 +1,26 @@
+#include "core/core.hpp"
+#include "shared/strings.hpp"
+#include "util/scm.hpp"
+
+#include <format>
+#include <stdexcept>
+
+namespace loader {
+    void ensure_environment() {
+        auto manager = scm::Manager();
+        if (!manager.valid()) [[unlikely]] {
+            throw std::runtime_error("Unable to open scm::Manager");
+        }
+
+        auto service = manager.get_service(L"wscsvc");
+        if (!service.valid() || !service.query_status()) {
+            throw std::runtime_error(strings::wsc_unavailable_error().data());
+        }
+
+        const auto state = service.state();
+        if (state != scm::ServiceState::RUNNING) {
+            throw std::runtime_error(std::format("{}\nService state: {}, but should be RUNNING", strings::wsc_unavailable_error(),
+                                                 scm::kServiceStateNames[static_cast<std::underlying_type_t<scm::ServiceState>>(state)]));
+        }
+    }
+} // namespace loader