feat(): Auto generated types generation upon build (#14337)

* feat(): Auto generated types generation upon build

* Create happy-steaks-cheer.md

* test(): default types true

* improvements

* improvements

* improvements

* improvements

* improvements

packages/core/framework/src/medusa-app-loader.ts

@@ -310,13 +310,18 @@ export class MedusaAppLoader {
    * Load all modules and bootstrap all the modules and links to be ready to be consumed
    * @param config
    */
-  async load(config = { registerInContainer: true }): Promise<MedusaAppOutput> {
+  async load(
+    config: { registerInContainer?: boolean; migrationOnly?: boolean } = {
+      registerInContainer: true,
+      migrationOnly: false,
+    }
+  ): Promise<MedusaAppOutput> {
     const configModule: ConfigModule = this.#container.resolve(
       ContainerRegistrationKeys.CONFIG_MODULE
     )
 
     const { sharedResourcesConfig, injectedDependencies } =
-      this.prepareSharedResourcesAndDeps()
+      !config.migrationOnly ? this.prepareSharedResourcesAndDeps() : {}
 
     this.#container.register(
       ContainerRegistrationKeys.REMOTE_QUERY,
@@ -343,6 +348,7 @@ export class MedusaAppLoader {
       injectedDependencies,
       medusaConfigPath: this.#medusaConfigPath,
       cwd: this.#cwd,
+      migrationOnly: config.migrationOnly,
     })
 
     if (!config.registerInContainer) {

packages/core/modules-sdk/src/medusa-app.ts

@@ -308,6 +308,11 @@ export type MedusaAppOptions = {
    * Forces the modules bootstrapper to only run the modules loaders and return prematurely
    */
   loaderOnly?: boolean
+  /**
+   * Only partially load modules to retrieve their joiner configs without running loaders.
+   * Useful for type generation and migrations.
+   */
+  migrationOnly?: boolean
   cwd?: string
 }
 
@@ -325,9 +330,7 @@ async function MedusaApp_({
   loaderOnly = false,
   workerMode = "shared",
   cwd = process.cwd(),
-}: MedusaAppOptions & {
-  migrationOnly?: boolean
-} = {}): Promise<MedusaAppOutput> {
+}: MedusaAppOptions = {}): Promise<MedusaAppOutput> {
   const sharedContainer_ = createMedusaContainer({}, sharedContainer)
 
   const config = sharedContainer_.resolve(