Add placeholders for docs/extensions

Signed-off-by: Sambhav Kothari <skothari44@bloomberg.net>

README.md

@@ -69,8 +69,7 @@ Our initial work focuses on:
 ├── GOVERNANCE.md            # Governance model, roles, and members
 ├── CONTRIBUTING.md          # Contribution guidelines
 ├── extensions/              # MCP extension specifications and examples
-├── docs/                    # Guides, whitepapers, and documentation
+└── docs/                    # Guides, whitepapers, and documentation
-└── templates/               # Templates for extensions and SEPs
 ```
 
 ## 🤝 Contributing

docs/README.md

@@ -0,0 +1,9 @@
+# Documentation
+
+This directory will host detailed documentation, specifications, diagrams, and meeting notes.
+
+Suggested sub-folders:
+- diagrams/
+- use-cases/
+
+Add or adapt as needed.

extensions/README.md

@@ -0,0 +1,10 @@
+# Extensions
+
+This directory will contain extension proposals, reference implementations, and related resources.
+
+Structure suggestion:
+- proposals/
+- implementations/
+- archived/
+
+(You can adjust as the working group formalizes the layout.)