Add getting the browser wallet and steps to start using console to "New to Vega?"

[ckpringle]

The Chore

• Update page to direct users to getting the browser wallet as the primary Vega Wallet.https://docs.vega.xyz/mainnet/concepts/new-to-vega
• ~Add getting started steps to get started using Console e.g. Once you have a wallet, you'll need to connect your wallet to Console, and deposit assets. In order to deposit assets you need to have an Ethereum wallet with funds relevant to the market you want to trade and enough ETH to pay network fees to approve its use on the Vega network. ~
• Just need make sure the New To Vega page points to the top level wallet docs including the browser extentions ... thats all here

Tasks

• What do we need to do first
• and then what?
• Etc.

Additional details / background info