wallets: add [rainbowWallet] (#210)

# Add Rainbow Wallet to wallet connectors
<img width="1440" alt="Screenshot 2025-03-19 at 17 16 12 (2)"
src="https://github.com/user-attachments/assets/c55a27bd-b4ef-4bc2-a2de-4d7b8b6fb7e8"
/>

### Description
This PR adds the Rainbow Wallet connector to our list of supported
wallets. Rainbow Wallet is a popular Ethereum wallet with a
user-friendly interface that will give users more options for connecting
to our dApp. The implementation follows our existing pattern for wallet
integration.

### Other changes
No other changes were made besides adding the Rainbow Wallet to the
wallet connectors list.

### Tested
- Manually tested the wallet connection flow with Rainbow Wallet
- Verified that the wallet appears correctly in the wallet selection
modal
- Confirmed that transactions can be signed and sent through the Rainbow
Wallet connector

### Related issues
- None

### Checklist before requesting a review
- [x] I have performed a self-review of my own code
- [ ] I have added unit-tests that prove my fix is effective or that my
feature works
- [x] The PR title follows the
[[conventions](https://www.notion.so/Git-Branching-and-Commit-Message-Conventions-18f66f7d06444cfcbac5725ffbc7c04a?pvs=4#9355048863c549ef92fe210a8a1298aa)](https://www.notion.so/Git-Branching-and-Commit-Message-Conventions-18f66f7d06444cfcbac5725ffbc7c04a?pvs=4#9355048863c549ef92fe210a8a1298aa)
- [x] I have run the [[regression
tests](https://www.notion.so/Mento-Web-App-Regression-Tests-37bd43a7da8d4e38b65993320a33d557)](https://www.notion.so/Mento-Web-App-Regression-Tests-37bd43a7da8d4e38b65993320a33d557)
- [x] The Smoke Test Run is passed ([[how to check the Smoke Test Run
job
result](https://www.notion.so/mentolabs/How-to-analyze-the-Smoke-Test-Run-1b6a2148cc5c80ec8834f2dd97491680)](https://www.notion.so/mentolabs/How-to-analyze-the-Smoke-Test-Run-1b6a2148cc5c80ec8834f2dd97491680))

Co-authored-by: chapati <philip.paetz@me.com>

Author: andrewkimjoseph

src/config/wallets.ts

@@ -2,6 +2,7 @@ import type { Chain } from '@rainbow-me/rainbowkit'
 import {
   metaMaskWallet,
   omniWallet,
+  rainbowWallet,
   trustWallet,
   walletConnectWallet,
 } from '@rainbow-me/rainbowkit/wallets'
@@ -23,6 +24,7 @@ export function getWalletConnectors(chains: Chain[]) {
     // CeloWallet(connectorConfig),
     omniWallet(connectorConfig),
     trustWallet(connectorConfig),
+    rainbowWallet(connectorConfig),
   ]
 }