feat: convert serial console into the serial plugin

plugins/serial/tests/backend/activate.test.ts

@@ -0,0 +1,37 @@
+import { describe, it, expect } from "vitest";
+import {
+  createMockCtx,
+  type MockPluginContext,
+} from "@termix/plugin-sdk/testing";
+import { PluginCapabilityError } from "@termix/plugin-sdk/backend";
+import type { PluginManifest } from "@termix/plugin-sdk/manifest";
+import manifestJson from "../../manifest.json";
+import { activate } from "../../src/backend/index.js";
+
+const manifest = manifestJson as unknown as PluginManifest;
+
+describe("serial activate", () => {
+  it("mounts the console WS route at /console with every declared capability", async () => {
+    const mock: MockPluginContext = createMockCtx({
+      pluginId: manifest.id,
+      manifest,
+      capabilities: manifest.capabilities,
+    });
+
+    await activate(mock.ctx);
+
+    expect(mock.wsRoutes).toEqual([{ path: "/console", raw: false }]);
+  });
+
+  it("refuses to mount without network:serve", async () => {
+    const mock: MockPluginContext = createMockCtx({
+      pluginId: manifest.id,
+      manifest,
+      capabilities: manifest.capabilities.filter((c) => c !== "network:serve"),
+    });
+
+    await expect(activate(mock.ctx)).rejects.toBeInstanceOf(
+      PluginCapabilityError,
+    );
+  });
+});