feat(medusa-oas-cli,oas-github-ci): new options + added download of OAS in api reference (#5453)

www/apps/api-reference/app/_mdx/client-libraries.mdx

@@ -1,5 +1,6 @@
 import { CodeTabs } from "docs-ui"
 import Space from "@/components/Space"
+import DownloadFull from "@/components/DownloadFull"
 
 ### Just Getting Started?
 
@@ -28,4 +29,10 @@ Check out the [quickstart guide](https://docs.medusajs.com/create-medusa-app).
       }
     }
   ]}
-/>
+/>
+
+### Download Full Reference
+
+Download this reference as an OpenApi YAML file. You can import this file to tools like Postman and start sending requests directly to your Medusa backend.
+
+<DownloadFull />

www/apps/api-reference/app/api/download/[area]/route.ts

@@ -0,0 +1,29 @@
+import { existsSync, readFileSync } from "fs"
+import { NextResponse } from "next/server"
+import path from "path"
+
+type DownloadParams = {
+  params: {
+    area: string
+  }
+}
+
+export function GET(request: Request, { params }: DownloadParams) {
+  const { area } = params
+  const filePath = path.join(process.cwd(), `specs/${area}/openapi.full.yaml`)
+
+  if (!existsSync(filePath)) {
+    return new NextResponse(null, {
+      status: 404,
+    })
+  }
+
+  const fileContent = readFileSync(filePath)
+
+  return new Response(fileContent, {
+    headers: {
+      "Content-Type": "application/x-yaml",
+      "Content-Disposition": `attachment; filename="openapi.yaml"`,
+    },
+  })
+}