chore(smart-wallet-sdk): add docs

sdks/smart-wallet-sdk/README.md

@@ -16,6 +16,82 @@ or
 yarn add @uniswap/smart-wallet-sdk
 ```
 
+## Quick Start
+
+This example demonstrates how to batch multiple calls through a smart wallet:
+
+```typescript
+import { ChainId } from '@uniswap/sdk-core'
+import { SmartWallet, CallPlanner } from '@uniswap/smart-wallet-sdk'
+
+// 1. Initialize a CallPlanner to batch multiple contract calls
+const planner = new CallPlanner()
+
+// 2. Add calls to the planner
+// Example: Add a token approval call
+planner.add(
+  '0x1234567890123456789012345678901234567890', // token contract address
+  0n, // no ETH value sent
+  '0x095ea7b3000000000000000000000000abcdef0123456789abcdef0123456789abcdef01000000000000000000000000000000000000000000000000000000000000ffff' // encoded approve function call
+)
+
+// Example: Add a swap call
+planner.add(
+  '0xabcdef0123456789abcdef0123456789abcdef01', // router contract address
+  0n, // no ETH value sent
+  '0x414bf389000000000000000000000000000000000000000000000000000000000000002000000000000000000000000000000000000000000000000000000000000000a0' // truncated swap function call
+)
+
+// 3. Encode calls using SmartWallet
+const methodParameters = SmartWallet.encodeCalls(planner.calls)
+
+// 4. Create the execute call that will be sent to the smart wallet
+const executeCall = SmartWallet.createExecute(
+  methodParameters,
+  ChainId.MAINNET
+)
+
+// 5. The executeCall can now be sent as a transaction
+console.log(executeCall)
+// {
+//   to: '0x0000000000000000000000000000000000000000', // smart wallet address
+//   data: '0x7a9a1628...', // encoded execute function call
+//   value: 0n // total ETH value to send
+// }
+```
+
+### Alternative: Add Calls Directly
+
+You can also create calls and pass them directly to the SmartWallet class:
+
+```typescript
+import { ChainId } from '@uniswap/sdk-core'
+import { SmartWallet } from '@uniswap/smart-wallet-sdk'
+
+// Create an array of calls
+const calls = [
+  {
+    to: '0x1234567890123456789012345678901234567890', 
+    data: '0x095ea7b3000000000000000000000000abcdef0123456789abcdef0123456789abcdef01000000000000000000000000000000000000000000000000000000000000ffff',
+    value: 0n
+  },
+  {
+    to: '0xabcdef0123456789abcdef0123456789abcdef01',
+    data: '0x414bf389000000000000000000000000000000000000000000000000000000000000002000000000000000000000000000000000000000000000000000000000000000a0',
+    value: 0n
+  }
+]
+
+// Encode calls using SmartWallet
+const methodParameters = SmartWallet.encodeCalls(calls)
+
+// Create the execute call
+const executeCall = SmartWallet.createExecute(
+  methodParameters,
+  ChainId.MAINNET
+)
+```
+
 ## Documentation
 
 Coming soon...