feat: add display kiosk host

packages/module-ui-host/tests/fixtures/artifact-module/ekklesia.module.json

@@ -1,5 +1,5 @@
 {
-  "manifestVersion": 5,
+  "manifestVersion": 6,
   "id": "example",
   "name": "Example",
   "version": "0.1.0",

packages/module-ui-host/tests/real-artifact.test.ts

@@ -56,7 +56,11 @@ function standaloneContext(requested: string[]): ModuleUiHostContext {
 describe("loading a real compiled artifact", () => {
   beforeAll(async () => {
     const result = await buildModuleUi({ moduleDirectory: fixtureDirectory });
-    artifactSource = await readFile(result.outputFile, "utf8");
+    const primaryArtifact = result.artifacts.find((artifact) => artifact.kind === "ui");
+    if (!primaryArtifact) {
+      throw new Error("The real-artifact fixture must declare a primary UI artifact.");
+    }
+    artifactSource = await readFile(primaryArtifact.outputFile, "utf8");
     artifactUrl = `data:text/javascript;base64,${Buffer.from(artifactSource, "utf8").toString("base64")}`;
   }, 60_000);