fix: escape newlines in shell arguments on Windows

close #70

cli/src/utils/shellEscape.ts

@@ -0,0 +1,10 @@
+/**
+ * Strip newlines when passing args through Windows cmd.exe.
+ * cmd.exe treats CR/LF as command separators and truncates multiline args.
+ */
+export function stripNewlinesForWindowsShellArg(value: string): string {
+    if (process.platform !== 'win32') {
+        return value;
+    }
+    return value.replace(/\r?\n/g, ' ');
+}