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/index.ts

@@ -0,0 +1,13 @@
+export * from "./content.service";
+export * from "./document.service";
+export * from "./search.service";
+export { toMeta } from "./row-map";
+
+export type {
+  DocSection,
+  DocStatus,
+  DocType,
+  Document,
+  DocumentMeta,
+  SearchHit,
+} from "@mcpedia/types";