add README and todo.md

Author: gianpaj

README.md

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+# Student & Client Time Tracking API
+
+A Next.js application for tracking student and client hours using Toggl Track integration.
+
+## Features
+
+- 🕒 Hours tracking integration with Toggl Track
+- 📊 Client-specific time tracking with custom tags
+- 💾 SQLite database for client data storage
+- 🔒 Type-safe API endpoints with Zod validation
+
+## Getting Started
+
+### Prerequisites
+
+- Node.js
+- Toggl Track account with API access
+
+### Environment Variables
+
+Create a `.env` file with:
+
+```bash
+TOGGL_API_EMAIL=your-email@example.com
+TOGGL_API_PASSWORD=your-password
+# DATABASE_URL=file:sqlite.db
+```
+
+### Installation
+
+```bash
+npm install
+```
+
+### Database Setup
+
+Seed the database with initial data:
+
+```bash
+npm run seed
+```
+
+### Development
+
+Start the development server:
+
+```bash
+npm run dev
+```
+
+### Build
+
+Create a production build:
+
+```bash
+npm run build
+```
+
+## API Endpoints
+
+### GET `/api/client/[clientId]`
+
+Retrieves client tracking data including remaining hours and last tracked entry.
+
+#### Parameters
+
+- `clientId` (UUID): The unique identifier for the client
+
+#### Response
+
+```json
+{
+  "clientId": "uuid",
+  "hoursRemaining": 40,
+  "lastPaidDate": "2024-01-01T00:00:00.000Z",
+  "togglLink": "https://track.toggl.com/timer?tags=client-tag",
+  "lastEntryTrackedDate": "2024-01-02T10:00:00.000Z"
+}
+```
+
+## Testing
+
+Run the test suite:
+
+```bash
+npm test
+```
+
+## Tech Stack
+
+- [Next.js](https://nextjs.org/)
+- [Drizzle ORM](https://orm.drizzle.team/)
+- [Toggl Track API](https://developers.track.toggl.com/)
+- [Vitest](https://vitest.dev/)
+- [Zod](https://zod.dev/)

todo.md

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+# TODO
+
+- set up tests with vitest <https://medium.com/@sanduni.s/api-testing-with-vitest-in-next-js-a-practical-guide-to-mocking-vs-spying-5e5b37677533>
+- deploy on tracking.escuela.dev on Vercel
+- deploy using Turso sqlite DB