docs: Hide Doorking/Linear brand guides and remove Seam Bridge

Doorking and Linear are no longer supported — hide their pages.
Seam Bridge is always shown in context of a system that needs it,
so it doesn't need its own brand guide.

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

Author: louis-pre

docs/brand-guides/SUMMARY.md

@@ -167,8 +167,6 @@
   * [Get started with Schlage Locks](schlage-locks/get-started-with-schlage-locks.md)
   * [Schlage Locks - Daylight Savings time adjustments](schlage-locks/schlage-locks-daylight-savings-time-adjustments.md)
   * [Sandbox Schlage Encode Locks](schlage-locks/schlage-encode-sample-data.md)
-* [Seam Bridge](seam-bridge/README.md)
-  * [Sandbox Seam Bridge](seam-bridge/seam-bridge-sample-data.md)
 * [Sensi Thermostats](sensi-thermostats/README.md)
   * [Get Started with Sensi Thermostats](sensi-thermostats/get-started-with-sensi-thermostats.md)
   * [Sandbox Sensi Thermostats](sensi-thermostats/sandbox-sensi-thermostats.md)

docs/brand-guides/doorking-callboxes/README.md

@@ -1,5 +1,7 @@
 ---
 description: Guide for using Doorking callboxes with Seam
+hidden: true
+noIndex: true
 ---
 
 # Doorking Callboxes

docs/brand-guides/linear-callboxes/README.md

@@ -1,5 +1,7 @@
 ---
 description: Guide for using Linear callboxes with Seam
+hidden: true
+noIndex: true
 ---
 
 # Linear Callboxes