[META] Update near-wallet.js to latest version on all examples

[gagdiez]

All our examples use the same near-wallet file that abstracts away the complexity of using the near-wallet-selector. We need to make sure all canonical examples have the methods used here:

https://github.com/near/near-discovery/blob/develop/src/components/wallet-selector/WalletSelector.ts

Notice that in the examples we use Javascript and JSDocs

• Hello World: https://github.com/near-examples/hello-near-examples
• Guest Book: https://github.com/near-examples/guest-book-examples
• Counters: https://github.com/near-examples/counters
• Coin Flip: https://github.com/near-examples/coin-flip-examples
• Donations: https://github.com/near-examples/donation-examples
• Multiple Contracts: https://github.com/near-examples/frontend-multiple-contracts
• etc

[PiVortex]

@gagdiez I think I should also add ethereum wallets to all examples, but I see you need this project ID. Did you set it up under a near account or your personal, we should probably have all the examples registered in the same place. https://docs.near.org/tools/ethereum-wallets#get-projectid