Update MM export, and docs (#1985)

Author: Adamj1232

docs/src/routes/docs/[...1]overview/[...1]introduction/+page.md

@@ -176,6 +176,7 @@ We recommend you add the [Core Repo](../../modules/core.md#install) and consider
 - [Frame](../../wallets/frame.md#install)
 - [Safe](../../wallets/gnosis.md#install)
 - [Magic](../../wallets/magic.md#login-options)
+- [MetaMask](../../wallets/metamask.md#install)
 - [MEW](../../wallets/mewwallet.md#install)
 - [Portis](../../wallets/portis.md#install)
 - [Web3Auth](../../wallets/web3auth.md#install)