fix: exit process with a status code when build fails (#11206)

Fixes: FRMW-2897
CLOSES CLO-434

Still need the frontend Admin bundler to provide some way to know if the build has failed or not.

packages/medusa/src/commands/plugin/build.ts

@@ -1,21 +1,24 @@
 import { Compiler } from "@medusajs/framework/build-tools"
 import { logger } from "@medusajs/framework/logger"
-export default async function build({
-  directory,
-}: {
-  directory: string
-}): Promise<boolean> {
+export default async function build({ directory }: { directory: string }) {
   logger.info("Starting build...")
   const compiler = new Compiler(directory, logger)
 
   const tsConfig = await compiler.loadTSConfigFile()
   if (!tsConfig) {
     logger.error("Unable to compile plugin")
-    return false
+    process.exit(1)
   }
 
   const bundler = await import("@medusajs/admin-bundler")
-  await compiler.buildPluginBackend(tsConfig)
-  await compiler.buildPluginAdminExtensions(bundler)
-  return true
+  const responses = await Promise.all([
+    compiler.buildPluginBackend(tsConfig),
+    compiler.buildPluginAdminExtensions(bundler),
+  ])
+
+  if (responses.every((response) => response === true)) {
+    process.exit(0)
+  } else {
+    process.exit(1)
+  }
 }