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/landing/test/frontmatter.test.ts

@@ -0,0 +1,18 @@
+import { describe, expect, it } from "vitest";
+import { parseFrontmatter } from "../src/lib/frontmatter";
+
+describe("parseFrontmatter", () => {
+  it("splits meta and body, tolerating colons and quotes in values", () => {
+    const { meta, body } = parseFrontmatter(
+      `---\ntitle: "Hello: world"\ndate: 2026-07-17\ncategory: news\n---\n\n# Body\n`,
+    );
+    expect(meta).toEqual({ title: "Hello: world", date: "2026-07-17", category: "news" });
+    expect(body).toBe("# Body");
+  });
+
+  it("returns the whole input as body when no frontmatter block exists", () => {
+    const { meta, body } = parseFrontmatter("# Just markdown\n");
+    expect(meta).toEqual({});
+    expect(body).toBe("# Just markdown");
+  });
+});