[WIP] Refactor everything server to be more modular and use recommended APIs.

Added long-running-operation tool and improved comments in all tools

* Updated architecture.md

* In tools/
  - add.ts
  - echo.ts
  - toggle-logging.ts
  - toggle-subscriber-updates.ts
    - Add better function and inline docs

* Added tools/long-running-operation.ts
  - similar implementation as in everything v1

* In tools/index.ts
  - import registerLongRunningOperationTool
  - in registerTools
    - registerLongRunningOperationTool

src/everything/tools/echo.ts

@@ -2,10 +2,12 @@ import { McpServer } from "@modelcontextprotocol/sdk/server/mcp.js";
 import { CallToolResult } from "@modelcontextprotocol/sdk/types.js";
 import { z } from "zod";
 
+// Tool input schema
 export const EchoSchema = z.object({
   message: z.string().describe("Message to echo"),
 });
 
+// Tool configuration
 const name = "echo";
 const config = {
   title: "Echo Tool",
@@ -13,6 +15,15 @@ const config = {
   inputSchema: EchoSchema,
 };
 
+/**
+ * Registers the Echo Tool with the provided McpServer instance.
+ *
+ * The Echo Tool validates input arguments using the EchoSchema and returns
+ * a response that echoes the message provided in the arguments.
+ *
+ * @param {McpServer} server - The server instance where the Echo Tool will be registered.
+ * @returns {void}
+ */
 export const registerEchoTool = (server: McpServer) => {
   server.registerTool(name, config, async (args): Promise<CallToolResult> => {
     const validatedArgs = EchoSchema.parse(args);