add some info to claude and readme

CLAUDE.md

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+# Zendegi
+
+Turborepo monorepo (pnpm) for a timeline web app. TanStack Start frontend with an embedded Flutter timeline widget.
+
+## Stack
+
+- **apps/web** — TanStack Start (React 19, Vite, Tailwind CSS v4)
+- **packages/auth** — better-auth wrapper
+- **packages/db** — Drizzle ORM + PostgreSQL (Docker)
+- **packages/env** — Type-safe env vars (t3-env + Zod)
+- **packages/config** — Shared TypeScript config
+- **packages/eslint-config** — Shared ESLint config (base + react)
+- **packages/z-timeline** — Flutter web app (embedded in the web page)
+
+## Lint Commands
+
+### Whole stack
+
+```sh
+pnpm check          # turbo lint + check-types + prettier --check
+pnpm fix            # turbo lint --fix + prettier --write
+```
+
+### Individual packages
+
+```sh
+# ESLint
+pnpm --filter web lint             # apps/web
+pnpm --filter @zendegi/auth lint   # packages/auth
+pnpm --filter @zendegi/db lint     # packages/db
+pnpm --filter @zendegi/env lint    # packages/env
+
+# Type checking
+pnpm --filter web check-types
+pnpm --filter @zendegi/auth check-types
+pnpm --filter @zendegi/db check-types
+pnpm --filter @zendegi/env check-types
+
+# Flutter (packages/z-timeline)
+cd packages/z-timeline && dart analyze
+```
+
+### Prettier (root-level)
+
+```sh
+prettier --check .     # check formatting
+prettier --write .     # fix formatting
+```