fix(scripts): use the .cmd bin shim on Windows for tsgo + oxfmt spawns

After replacing pnpm exec with node_modules/.bin/<tool>, the Windows build
died with "'node_modules' is not recognized" — the extension-less .bin file
is a POSIX sh script cmd.exe (shell: WIN32) can't run. Pick node_modules\.bin\
<tool>.cmd on win32, the shim npm writes for exactly this. Covers the tsgo
declarations build and the api-index oxfmt pass.

Author: jdalton

scripts/bundle/steps.mts

@@ -104,8 +104,11 @@ export async function buildTypes(
   }
 
   commands.push({
+    // npm writes a `.cmd` shim on Windows; the extension-less file is a POSIX
+    // sh script cmd.exe can't run ("'node_modules' is not recognized"), so pick
+    // the platform-correct shim. shell: WIN32 lets cmd.exe resolve the .cmd.
     args: ['--project', 'tsconfig.dts.json'],
-    command: 'node_modules/.bin/tsgo',
+    command: WIN32 ? 'node_modules\\.bin\\tsgo.cmd' : 'node_modules/.bin/tsgo',
     options: {
       shell: WIN32,
     },

scripts/repo/make-api-index-md.mts

@@ -173,7 +173,9 @@ async function main(): Promise<void> {
   // alignment behaviour) wins over oxfmt's built-in default config.
   try {
     await spawn(
-      'node_modules/.bin/oxfmt',
+      // Windows needs the .cmd shim — the extension-less .bin file is a POSIX
+      // sh script cmd.exe (shell: WIN32) can't run.
+      WIN32 ? 'node_modules\\.bin\\oxfmt.cmd' : 'node_modules/.bin/oxfmt',
       [
         '-c',
         '.config/fleet/oxfmtrc.json',