feat(webpack): add fallback for optional wallet dependencies

[drichar]

Description

This PR introduces a webpackFallback object to handle optional wallet dependencies in Next.js applications using @txnlab/use-wallet. This allows applications to build without these packages installed, enabling users to include only the wallet packages they need.

Usage

// next.config.mjs

import { webpackFallback } from '@txnlab/use-wallet-react'

/** @type {import('next').NextConfig} */
const nextConfig = {
  /* config options here */
  webpack: (config, { isServer }) => {
    if (!isServer) {
      config.resolve.fallback = {
        ...config.resolve.fallback,
        ...webpackFallback
      }
    }
    return config
  }
}
 
export default nextConfig

Details

• Add webpackFallback object in src/webpack.ts
• Export webpackFallback from the main src/index.ts file
• Update Next.js example app to use the new webpackFallback

This change simplifies the configuration process for Next.js applications and ensures that the fallback configuration is maintained within the @txnlab/use-wallet library, making it easier to keep up-to-date as new optional dependencies are added.