docs: add getting started guide for examples

docs/getting-started-with-examples.md

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+# Getting started with the Polymarket examples
+
+This document explains how to set up and run the examples in this repository using a local Node.js environment.
+
+It is intended for developers who are new to the Polymarket API and want a simple, copy-pasteable workflow for trying out the examples.
+
+---
+
+## 1. What this repository contains
+
+This repository provides TypeScript examples that demonstrate how to:
+
+- interact with Polymarket smart contract wallets
+- work with proxy wallets (email / Magic accounts)
+- work with safe wallets (browser wallets like MetaMask or Rainbow)
+
+The examples are organized under the `examples/` directory.  
+You can run them directly with `ts-node` once your environment is configured.
+
+For a high-level overview of Polymarket developer tooling (CLOB clients, order utils, Gamma API, etc.), refer to the official documentation website.
+
+---
+
+## 2. Prerequisites
+
+Before running any examples, you will need:
+
+- **Node.js** (recommended: LTS or newer)
+- **Yarn** or **npm** for installing dependencies
+- A **Polymarket account** with access to the relevant network
+- Any required API keys or private keys, depending on the example you run
+
+> Never commit secrets (private keys, API keys, etc.) to Git.  
+> Always keep them in local `.env` files or secret managers.
+
+---
+
+## 3. Installing dependencies
+
+From the repository root:
+
+1. Install dependencies:
+
+   ```bash
+   yarn install