chore: add #[non_exhaustive] and mutation methods to improve compatibility (#715)

* chore: add #[non_exhaustive] to reduce backwards-incompatible changes going forward

* fix: remove ProtocolVersion import

* fix: add a few more with_ mutator methods

---------

Co-authored-by: Alex Hancock <alexhancock@block.xyz>

examples/simple-chat-client/src/tool.rs

@@ -57,15 +57,11 @@ impl Tool for McpToolAdapter {
             _ => None,
         };
         println!("arguments: {:?}", arguments);
-        let call_result = self
-            .server
-            .call_tool(CallToolRequestParams {
-                meta: None,
-                name: self.tool.name.clone(),
-                arguments,
-                task: None,
-            })
-            .await?;
+        let mut params = CallToolRequestParams::new(self.tool.name.clone());
+        if let Some(args) = arguments {
+            params = params.with_arguments(args);
+        }
+        let call_result = self.server.call_tool(params).await?;
 
         Ok(call_result)
     }