docs: add explanations for Serverless, Members, and Special layers in Landscape Guide

Signed-off-by: Aarya Dharmadhikari <[email protected]>

Author: aarya9850

docs/landscape-guide.md

@@ -0,0 +1,23 @@
+# Landscape Guide — Architecture Layers
+
+The architecture diagram includes multiple columns and a bottom-most layer labeled **Special**, which are not currently documented.  
+This document provides clear explanations for those components.
+
+---
+
+### Serverless Column
+Represents services that run without dedicated server management, scale automatically, and execute on demand or via events.  
+Common use: cloud functions, scheduled triggers, background event-driven tasks.  
+Examples: AWS Lambda, Azure Functions, Google Cloud Functions.
+
+---
+
+### Members Column
+Represents users or entities that interact with, own, or maintain parts of the landscape.  
+Includes maintainers, contributors, project owners, or affiliated members with access or responsibility in the system.
+
+---
+
+### Special Layer (Bottom-most)
+Contains components that do not belong to standard infrastructure categories but are still essential to the ecosystem.  
+Includes internal tools, experimental modules, auxiliary automation, legacy support services, or one-off dependencies that require separate classification.