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/docs/src/main.tsx

@@ -0,0 +1,14 @@
+/** Docs entry point: mounts the React root component. */
+import { StrictMode } from "react";
+import { createRoot } from "react-dom/client";
+import { App } from "./app";
+import "./styles.css";
+
+const container = document.getElementById("root");
+if (!container) throw new Error("#root mount point not found");
+
+createRoot(container).render(
+  <StrictMode>
+    <App />
+  </StrictMode>,
+);