feat(bridge): establish local pi status bridge

Deliver the initial local bridge, Noctalia v4/v5 adapters, desktop client, service unit, tests, and implementation documentation for persistent Pi status and control.

test/noctalia-ipc.test.js

@@ -0,0 +1,34 @@
+import assert from "node:assert/strict";
+import test from "node:test";
+import { publishNoctaliaState } from "../src/client/noctalia-ipc.js";
+
+test("publishes presentation state through Noctalia's documented IPC command", async () => {
+	const calls = [];
+	await publishNoctaliaState(
+		{
+			state: "streaming",
+			projectLabel: "feature",
+			attentionCount: 2,
+			detail: "Streaming",
+		},
+		{ execute: async (command, args) => calls.push({ command, args }) },
+	);
+
+	assert.deepEqual(calls, [
+		{
+			command: "qs",
+			args: [
+				"-c",
+				"noctalia-shell",
+				"ipc",
+				"call",
+				"plugin:pi-status-bridge",
+				"setBridgeState",
+				"streaming",
+				"feature",
+				"2",
+				"Streaming",
+			],
+		},
+	]);
+});