prepare testing UI

src/View/maintenance.tsx

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+import * as React from 'bloatless-react';
+
+import ConnectionModel from '../Model/connectionModel';
+
+// model
+const connectionModel = new ConnectionModel();
+
+// state
+const address = new React.State("");
+
+// methods
+function connect() {
+    connectionModel.connect(address.value);
+}
+
+function disconnect() {
+    connectionModel.disconnect();
+}
+
+// view
+document.querySelector("main")!.append(
+    <div class="flex-column">
+        <input bind:value={address}></input>
+        <button on:click={connect}>Connect</button>
+        <button on:click={disconnect}>Disconnect</button>
+    </div>
+)

src/index.tsx

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+import "./View/maintenance";