refactor: drop skill file, rework client

main.ts

@@ -4,7 +4,7 @@ import { StdioServerTransport } from "@modelcontextprotocol/sdk/server/stdio.js"
 import { Command } from "commander";
 import crypto from "node:crypto";
 import http from "node:http";
-import { initDataDir } from "./ews_client.ts";
+import { initDataDir } from "./utils/data.ts";
 import { registerAuthTools } from "./tools/auth.ts";
 import { registerAvailabilityTools } from "./tools/availability.ts";
 import { registerCalendarTools } from "./tools/calendar.ts";