docs: add comprehensive Tonkeeper setup and buy guide

01-wallet/tonkeeper-setup.md

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+# How to Set Up Tonkeeper and Buy Your First TON
+
+Welcome to the TON ecosystem! Tonkeeper is the most popular and user-friendly non-custodial wallet for the TON blockchain. This guide will walk you through the process of setting up your wallet and acquiring your first TON coins from scratch.
+
+---
+
+## 🛡️ Step 1: Installation
+
+1. **Download the App**: Search for "Tonkeeper" in the [Apple App Store](https://apps.apple.com/app/tonkeeper/id1551532000) or [Google Play Store](https://play.google.com/store/apps/details?id=io.tonkeeper).
+2. **Verify the Developer**: Ensure the app is published by **Tonkeeper**. Be cautious of fake apps.
+3. **Launch**: Open the app and select **"Create a new wallet"**.
+
+---
+
+## 🔑 Step 2: Creating Your Wallet & Security
+
+Since Tonkeeper is **non-custodial**, you are the only one who holds the keys to your funds.
+
+1. **Backup Your Recovery Phrase**: The app will generate a 24-word recovery phrase (seed phrase). 
+   - ⚠️ **CRITICAL**: Write these words down on a physical piece of paper.
+   - ⚠️ **NEVER** share this phrase with anyone.
+   - ⚠️ **NEVER** save it in a screenshot, email, or cloud storage.
+2. **Confirm the Phrase**: The app will ask you to verify the phrase to ensure you've saved it correctly.
+3. **Set a Passcode**: Create a secure PIN or enable Biometrics (FaceID/TouchID) for quick and safe access.
+
+---
+
+## 💰 Step 3: How to Buy TON
+
+There are three primary ways to get TON into your wallet:
+
+### Option A: Buy Directly in Tonkeeper (Fastest)
+Tonkeeper integrates third-party payment providers (like MoonPay or Banxa) to allow you to buy TON with a credit card.
+1. Tap the **"Buy"** button on the main screen.
+2. Select your preferred provider.
+3. Enter the amount of TON you wish to purchase.
+4. Follow the KYC (Know Your Customer) process and complete the payment.
+
+### Option B: Use a Centralized Exchange (CEX)
+If you have an account on Binance, OKX, Bybit, or KuCoin:
+1. Go to the **"Withdraw"** section for TON.
+2. **Copy your Address**: In Tonkeeper, tap your address (at the top) and copy it.
+3. **Paste Address**: Paste this address into the exchange's withdrawal field.
+4. **Select Network**: Ensure you select the **TON Network**.
+5. **Confirm**: Send the funds. They will appear in your wallet in a few minutes.
+
+### Option C: Peer-to-Peer (P2P)
+Use platforms like Telegram's `@wallet` or other P2P markets to buy TON from other users.
+1. Find a trusted seller.
+2. Provide your Tonkeeper address.
+3. Confirm payment via the agreed method.
+
+---
+
+## 🚀 Step 4: Your First Transaction
+
+Now that you have TON, let's test it!
+1. Tap **"Send"**.
+2. Enter a destination address or search for a contact.
+3. Enter the amount.
+4. Review the transaction fee (gas) and tap **"Send"**.
+
+---
+
+## 💡 Pro Tips & Security Checklist
+
+- ✅ **Small Test First**: When sending a large amount from an exchange, always send a small "test" amount first to verify the address.
+- ✅ **Check the Address**: Always double-check the first and last 4 characters of the address before confirming.
+- ✅ **Avoid "Support" DMs**: Real TON support will **never** DM you first or ask for your recovery phrase.
+- ✅ **Update the App**: Keep Tonkeeper updated to the latest version to ensure you have the latest security patches.
+
+**Happy exploring the TON blockchain!** 💎