Add cmd installer entrypoint for Windows

tests/release_scripts.rs

@@ -235,6 +235,20 @@ fn windows_installer_bootstraps_git_for_source_fallback_like_unix() {
     assert!(!ps1.contains("Require-Command git"));
 }
 
+#[test]
+fn windows_cmd_installer_wraps_native_powershell_installer() {
+    let cmd = include_str!("../install.cmd");
+    let readme = include_str!("../README.md");
+    assert!(cmd.contains("@echo off"));
+    assert!(cmd.contains("https://git.palav.dev/Palav/dosh/raw/branch/main/install.ps1"));
+    assert!(cmd.contains("for %%P in (powershell.exe pwsh.exe powershell pwsh) do"));
+    assert!(cmd.contains("Invoke-WebRequest -UseBasicParsing"));
+    assert!(cmd.contains("-ExecutionPolicy Bypass -File \"%TMP_PS%\" %*"));
+    assert!(cmd.contains("exit /b %RC%"));
+    assert!(readme.contains("Windows client from `cmd.exe`:"));
+    assert!(readme.contains("install.cmd"));
+}
+
 #[test]
 fn windows_installer_honors_quiet_update_mode() {
     let ps1 = include_str!("../install.ps1");