Feature/cpass 1226 support for solana connection config

[kevinhcolgan]

This PR adds support for passing through additional solana connection config in the solana chain definition. This enables features such as using JWT-auth protected solana endpoints.

In this PR:

• changes to the solana multichain RC to allow commitmentOrConfig to be passed in per-chain
• an example dApp 'solana-jwt-react' that implements a dApp that uses a JWT-protected endpoint and overrides the 'fetch' function in commitmentOrConfig to pass in a Bearer Auth token retrieved from a JWT auth server
• an example JWT auth server that can be used as a test endpoint to generate JWTs for testing (as long as the solana endpoint is configured to use the public_pem that it uses)
• fixed the wallet-connect project Id references to accept an env var REACT_APP_WALLET_CONNECT_PROJECT_ID