feat(mcpedia): Phase 1 MVP — monorepo, Core, Web UI, MCP server, Postgres FTS

- bun workspaces + Turborepo monorepo (apps/web, apps/mcp; packages/*, scripts)
- @mcpedia/core single business-logic layer (Document/Content/Search services)
- @mcpedia/db Drizzle schema: documents + weighted tsvector (GIN) for FTS
- @mcpedia/parser frontmatter, @mcpedia/search Postgres FTS (ts_rank+ts_headline)
- Next.js 16 Web UI (home/doc SSG, search dynamic) + react-markdown render
- MCP server (stdio) with 4 tools + in-memory smoke test
- scripts/indexer walks content/ -> upserts into Postgres
- 4 seed docs; README + PHASES status

packages/core/src/content.service.ts

@@ -0,0 +1,23 @@
+import { readdirSync, readFileSync, statSync } from "node:fs";
+import { join, relative } from "node:path";
+import { CONTENT_ROOT } from "@mcpedia/config";
+
+/** List all markdown/mdx content files relative to CONTENT_ROOT. */
+export function listContentFiles(): string[] {
+  const out: string[] = [];
+  const walk = (dir: string) => {
+    for (const entry of readdirSync(dir)) {
+      const full = join(dir, entry);
+      const st = statSync(full);
+      if (st.isDirectory()) walk(full);
+      else if (/\.mdx?$/.test(entry)) out.push(relative(CONTENT_ROOT, full));
+    }
+  };
+  walk(CONTENT_ROOT);
+  return out;
+}
+
+/** Read a content file's raw text by relative path. */
+export function readContentFile(relPath: string): string {
+  return readFileSync(join(CONTENT_ROOT, relPath), "utf8");
+}