chore: initial Vector 2.0 monorepo

Ground-up TypeScript rewrite of the Vector hardware parts inventory
system. Ships the full roadmap (Phases 0-8) in one initial commit:

- pnpm + Turbo monorepo: apps/{api,web,e2e}, packages/{db,shared,ui,config}
- Express 5 + Prisma 5 + zod validation + JWT w/ refresh-token rotation
- React 19 + Vite + shadcn/ui + TanStack Query/Table + nuqs URL state
- Repair/RMA, tags, bulk ops, saved views, CSV audit export
- Analytics dashboard on Recharts + EOL tracking
- Signed webhook subscriptions (HMAC-SHA256) with in-process emitter
- Vitest unit tests (shared schemas, api services/helpers) + Playwright skeleton
- Gitea Actions CI (lint, typecheck, test+coverage, build) + Renovate

Deferred follow-ups: Postgres cutover (data-migration script ready),
BullMQ worker for webhook delivery, @react-pdf PDF export, CSV import wizard.

README.md

@@ -0,0 +1,41 @@
+# Vector 2.0
+
+Hardware parts inventory — monorepo.
+
+## Layout
+
+```
+apps/
+  web/       # React + Vite client
+  api/       # Express + Prisma API
+packages/
+  db/        # Prisma schema + client (placeholder)
+  shared/    # Shared zod schemas + types (placeholder)
+  ui/        # Design system + shadcn primitives (placeholder)
+  config/    # Shared eslint / tsconfig / tailwind (placeholder)
+```
+
+## Prereqs
+
+- Node >= 20
+- pnpm (via `npm i -g pnpm` or corepack)
+- Docker (for Postgres + Redis in later phases — current apps still use SQLite)
+
+## Quick start
+
+```bash
+pnpm install
+pnpm dev          # runs apps/web and apps/api concurrently via Turbo
+```
+
+The API listens on `http://localhost:3001`; the web app proxies `/api` to it and serves on `http://localhost:5173`.
+
+## Phase status
+
+**Phase 0 — Monorepo foundation** ✅
+- pnpm workspaces + Turbo
+- `apps/web` and `apps/api` scaffolded
+- `packages/*` placeholders
+- `docker-compose.yml` for Postgres + Redis
+
+Later phases: TypeScript + Postgres migration, API refactor, schema extensions, shadcn redesign, feature slices, observability.