Add generate random data example (#292)

Author: Sumeet213

examples/generate_random_data/.env.example

@@ -0,0 +1,2 @@
+# Copy this file to .env and fill in your integration token
+NOTION_TOKEN=your_integration_token_here

examples/generate_random_data/README.md

@@ -0,0 +1,61 @@
+# Generate Random Data Example
+
+## Overview
+
+Populate any Notion database with realistic test data. This example
+automatically detects your database schema and generates appropriate fake data
+for each property type.
+
+## Setup
+
+### 1. Clone and install
+
+```bash
+# Clone this repository locally
+git clone https://github.com/ramnes/notion-sdk-py.git
+
+# Switch into this project
+cd notion-sdk-py/examples/generate_random_data
+
+# Install the dependencies
+pip install -r requirements.txt
+```
+
+### 2. Create a Notion integration
+
+1. Visit [My Integrations](https://www.notion.so/my-integrations)
+2. Click "New integration"
+3. Give it a name and save
+4. Copy the integration token
+
+### 3. Share a database with your integration
+
+1. Open any database in Notion
+2. Click "..." menu → "Add connections"
+3. Search for and add your integration
+
+### 4. Configure and run
+
+```bash
+# Set your integration token (or add to .env file)
+export NOTION_TOKEN=your-integration-token
+
+# Run the script
+python generate_random_data.py
+```
+
+## Features
+
+- Detects database schema automatically
+- Creates 10 test entries with realistic data
+- Shows filtering and querying examples
+
+## Property Types
+
+- Title & Rich Text
+- Number
+- Select & Multi-select
+- Date
+- Checkbox
+- URL, Email, Phone Number
+- Files (as external URLs)