Simplify install with one-click scripts; honor HTTP(S)_PROXY for Telegram.

Add install.ps1/install.sh, shrink README to script-first flow, register bot commands, and route API calls through undici EnvHttpProxyAgent when a proxy is set (v0.2.2).

Co-authored-by: Cursor <cursoragent@cursor.com>

tests/apply.test.ts

@@ -9,7 +9,7 @@ test('apply without token does not throw and does not start effect', () => {
       effects.push(name)
       return () => {}
     },
-    logger: { error() {}, warn() {} },
+    logger: { info() {}, error() {}, warn() {} },
     agents: {},
   } as any
   const prev = process.env.DSH_TELEGRAM_TOKEN