Add paymaster to CdpSmartWallet

[phdargen]

Description

Adds optional paymaster config to CdpSmartWalletProvider and corresponding chatbot and next template

Tests

Chatbot: typescript/examples/langchain-smart-wallet-chatbot/chatbot.ts
Network: Base mainnet
Setup: Funded with 0.05 USDC, no ETH

Prompt: wallet info

-------------------
Wallet Details:
- Provider: cdp_smart_wallet_provider
- Address: 0x5b246593DfCD2f462490E49A16FF4Df106640b02
- Network:
  * Protocol Family: evm
  * Network ID: base-mainnet
  * Chain ID: 8453
- Native Balance: 0 WEI
-------------------
You are currently connected to the Base Mainnet with the wallet address **0x5b246593DfCD2f462490E49A16FF4Df106640b02**. Your native balance is 0 WEI. If you need any funds, please let me know!
-------------------

Prompt: check usdc 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 balance

-------------------
Balance of 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 is 0.05
-------------------
The balance of USDC (contract address **0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913**) in your wallet is **0.05 USDC**. If you need further assistance, let me know!
-------------------

Prompt: send 0.01 usdc to 0xf2d4580ADfe8E012f5550322706d62DF11fDBE21 

-------------------
Error transferring the asset: SyntaxError: Cannot convert 0.01 to a BigInt
-------------------
It seems there was an issue with the amount format for the transfer. The amount needs to be specified in the smallest unit for USDC. Since 1 USDC = 10^6 units, I'll convert 0.01 USDC to the smallest unit, which is 10000.

I'll proceed to send 10000 USDC units (0.01 USDC) to the specified address. 
-------------------
Transferred 10000 of 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 to 0xf2d4580ADfe8E012f5550322706d62DF11fDBE21.
Transaction hash for the transfer: 0xf1d03399fb89fe126885daaac889e752b2f9aee24f2ec4074f5357be4062f2c8
-------------------
I have successfully transferred **0.01 USDC** (10000 units) to the address **0xf2d4580ADfe8E012f5550322706d62DF11fDBE21**. 

The transaction hash for this transfer is: **0xf1d03399fb89fe126885daaac889e752b2f9aee24f2ec4074f5357be4062f2c8**.

Checklist

A couple of things to include in your PR for completeness:

• Added documentation to all relevant README.md files
• Added a changelog entry

[cb-heimdall]

✅ Heimdall Review Status

Requirement	Status	More Info
Reviews	✅ 1/1	Denominator calculation Show calculation 1 if user is bot 0 1 if user is external 0 2 if repo is sensitive 0 From .codeflow.yml 1 Additional review requirements Show calculation Max 0 0 From CODEOWNERS 0 Global minimum 0 Max 1 1 1 if commit is unverified 0 Sum 1

[CarsonRoscoe]

Wonderful, ty for the contribution!

[cb-heimdall]

Review Error for Jeddyvgf @ 2025-09-22 01:47:40 UTC
User must have write permissions to review

[cb-heimdall]

Review Error for Jeddyvgf @ 2025-09-22 01:55:53 UTC
User must have write permissions to review