Move for-device-manufacturers/ files to device-manufacturer-guidance/

5 files under "## Device Manufacturer Guidance" in SUMMARY.md were in
for-device-manufacturers/ instead of device-manufacturer-guidance/.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

Author: louis-pre

docs/guides/SUMMARY.md

@@ -381,8 +381,8 @@
   * [Implementing Lock Actions](device-manufacturer-guidance/building-a-seam-compatible-smart-lock-api/implementing-lock-actions.md)
   * [Implementing Access Codes](device-manufacturer-guidance/building-a-seam-compatible-smart-lock-api/implementing-access-codes.md)
   * [Webhooks & Events](device-manufacturer-guidance/building-a-seam-compatible-smart-lock-api/webhooks-and-events.md)
-* [Creating a Seam-Compatible Intercom API](for-device-manufacturers/creating-a-seam-compatible-intercom-api/README.md)
-  * [Creating OAuth Endpoints](for-device-manufacturers/creating-a-seam-compatible-intercom-api/creating-oauth-endpoints.md)
-  * [Creating Intercom CRUD Endpoints](for-device-manufacturers/creating-a-seam-compatible-intercom-api/creating-intercom-crud-endpoints.md)
-  * [Creating Access Code CRUD Endpoints](for-device-manufacturers/creating-a-seam-compatible-intercom-api/creating-access-code-crud-endpoints.md)
-  * [Creating the Health Endpoint](for-device-manufacturers/creating-a-seam-compatible-door-locks-api/creating-the-health-endpoint.md)
+* [Creating a Seam-Compatible Intercom API](device-manufacturer-guidance/creating-a-seam-compatible-intercom-api/README.md)
+  * [Creating OAuth Endpoints](device-manufacturer-guidance/creating-a-seam-compatible-intercom-api/creating-oauth-endpoints.md)
+  * [Creating Intercom CRUD Endpoints](device-manufacturer-guidance/creating-a-seam-compatible-intercom-api/creating-intercom-crud-endpoints.md)
+  * [Creating Access Code CRUD Endpoints](device-manufacturer-guidance/creating-a-seam-compatible-intercom-api/creating-access-code-crud-endpoints.md)
+  * [Creating the Health Endpoint](device-manufacturer-guidance/creating-a-seam-compatible-door-locks-api/creating-the-health-endpoint.md)