Initialize repository with harness code and assets

Initial import of all source code, config, and README assets: the
packages workspace (cli, core, server, web, docs, landing, skills),
build scripts, tooling config, and CI workflows.

Includes the data-layout revision made on this branch: the local data
root defaults to ~/.penguin/data (PENGUIN_HOME still overrides; the
installer keeps its binaries in ~/.penguin), and every Agent lives
under <project>/agents/<agent>/ — path helpers, the three
agent-enumeration scans, the system prompt, built-in Skills, tests
and docs all follow the new layout.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_018ihk8iQuo3kv2aPjAYEPuR

packages/web/src/lib/use-document-title.ts

@@ -0,0 +1,15 @@
+/**
+ * Sync the browser tab title (document.title): "{title} · PenguinHarness"
+ * when a page title is set, falling back to the app name otherwise. Called
+ * at the top level of each page component, updating instantly on route
+ * changes or title changes (e.g. an auto-generated Session title delivered
+ * via a session_title event).
+ */
+import { useEffect } from "react";
+import { S } from "./strings";
+
+export function useDocumentTitle(title: string | null | undefined): void {
+  useEffect(() => {
+    document.title = title ? `${title} · ${S.appName}` : S.appName;
+  }, [title]);
+}