feat: type the plugin host record, move plugin strings out of core and add lint checks

plugins/proxmox/tests/backend/routes.test.ts

@@ -0,0 +1,12 @@
+import { describe, expect, it } from "vitest";
+import { guestPluginSettings } from "../../src/backend/routes.js";
+
+describe("guestPluginSettings", () => {
+  it("names the plugin that keeps each switch an imported guest needs", () => {
+    expect(guestPluginSettings("rdp", true)).toEqual({
+      "remote-desktop": { enableRdp: true, rdpPort: 3389 },
+      docker: { enableDocker: true },
+    });
+    expect(guestPluginSettings("ssh", false)).toEqual({});
+  });
+});