Add README for TimeToLeave project

Adds comprehensive setup and structure documentation to the root README file. This outlines the monorepo structure,
prerequisites, and development workflow for new contributors.

README.md

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+# TimeToLeave
+
+Time-To-Leave is a multi-platform application designed to [Briefly describe the project's purpose, e.g., track professional commitments, manage time-off requests, etc.]. This repository follows a monorepo structure, separating concerns into distinct applications and reusable packages.
+
+## 🚀 Getting Started
+
+These instructions will get you a copy of the project running on your local machine for development and testing purposes.
+
+### Prerequisites
+
+*   Node.js
+*   npm/yarn
+
+### Installation
+
+1.  **Clone the repository:**
+    ```bash
+    # Assuming git is used
+    # git clone <repository-url>
+    # cd TimeToLeave
+    ```
+
+2.  **Install dependencies:**
+    ```bash
+    npm install
+    ```
+
+## 🧱 Project Structure Overview
+
+This project uses a monorepo setup to manage multiple, interconnected parts:
+
+*   **`apps/`**: Contains the primary deployable applications.
+    *   `apps/web`: The main web interface for the user.
+    *   `apps/mobile`: The mobile application client.
+*   **`packages/`**: Contains reusable, domain-specific logic and shared utilities.
+    *   `packages/core`: Core business logic and domain models.
+    *   `packages/api-client`: Handles interactions with the backend API.
+
+## 🛠 Development & Running the Application
+
+The `package.json` defines several scripts to assist with development:
+
+| Script | Command | Description |
+| :--- | :--- | :--- |
+| `dev` | `npm run dev -w apps/web` | Starts the development server for the Web application. |
+| `dev:mobile` | `npm run start -w apps/mobile` | Starts the mobile client development server. |
+| `build` | `npm run build -w apps/web` | Builds the production bundle for the Web application. |
+| `test` | `npm run test -w apps/web` | Runs unit and integration tests for the Web application. |
+| `lint` | `npm run lint -w apps/web && npm run lint -w apps/mobile` | Runs linting checks across both web and mobile clients. |
+
+### Development Workflow Tip
+
+When working on shared logic, modify files in `packages/core` or `packages/api-client`. Remember to run tests or restart the services to ensure changes are propagated correctly across the consuming apps.
+
+## 🛡️ Testing & Quality Assurance
+
+The project provides comprehensive scripts for maintaining code quality:
+
+*   **Linting:** Use `npm run lint` to catch stylistic and structural errors.
+*   **Type Checking:** Use `npm run typecheck` to ensure type safety across the codebase.
+
+## 📄 API Documentation
+
+[Add link or reference to API documentation here once the backend services are finalized.]
+
+---
+*This README was generated based on the detected monorepo structure and dependencies.*