feat: add plugin build command (#10935)

Fixes: FRMW-2863

Adds the `plugin:build` command that is used to compile the source code of a plugin for publishing it to a package registry. The command is similar to the `build` command, except it does not copy the `package.json` and the `lock` files to the build output

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

@@ -0,0 +1,22 @@
+import { logger } from "@medusajs/framework/logger"
+import { Compiler } from "@medusajs/framework/build-tools"
+
+export default async function build({
+  directory,
+  adminOnly,
+}: {
+  directory: string
+  adminOnly: boolean
+}): Promise<boolean> {
+  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
+  }
+
+  await compiler.buildPluginBackend(tsConfig)
+  return true
+}