Merge pull request modelcontextprotocol#26 from modelcontextprotocol/justin/fix-capabilities

Add missing `capabilities` fields

Author: jspahrsummers

docs/concepts/transports.mdx

@@ -64,6 +64,8 @@ Use stdio when:
     const server = new Server({
       name: "example-server",
       version: "1.0.0"
+    }, {
+      capabilities: {}
     });
 
     const transport = new StdioServerTransport();
@@ -75,6 +77,8 @@ Use stdio when:
     const client = new Client({
       name: "example-client",
       version: "1.0.0"
+    }, {
+      capabilities: {}
     });
 
     const transport = new StdioClientTransport({
@@ -125,6 +129,8 @@ Use SSE when:
     const server = new Server({
       name: "example-server",
       version: "1.0.0"
+    }, {
+      capabilities: {}
     });
 
     const transport = new SSEServerTransport("/message", response);
@@ -136,6 +142,8 @@ Use SSE when:
     const client = new Client({
       name: "example-client",
       version: "1.0.0"
+    }, {
+      capabilities: {}
     });
 
     const transport = new SSEClientTransport(