Use `@solana/wallet-adapter-react` for compatibility with Mobile Wallet Adapter and the Wallet Standard

[jordaaash]

In this PR we upgrade @solana/wallet-adapter-react and replace a modified WalletProvider and various hooks. The main benefit of doing so is that Mango gets the following for free:

1. The ability to connect to any mobile wallet app that supports the Solana Mobile Stack Mobile Wallet Adapter Protocol.
2. The ability to connect to any desktop wallet that supports the Solana Wallet Standard.

You can read much more about the wider effort to upgrade the entire ecosystem of Solana web apps at: https://github.com/solana-labs/wallet-adapter/issues/604

Approach

Mango's UI makes use of a custom WalletProvider context provider implementation. This copies many behaviors from the one in @solana/wallet-adapter-react, but removes the clearing of wallets on disconnection and errors. Because the stock @solana/wallet-adapter-react WalletProvider is needed to get the above benefits, we restore it in this PR.

However, we extend this with a custom child provider that implements the behavior that Mango's UI currently has, of preselecting the first displayed wallet, remembering it, and displaying it in the connect button. In this way, we're able to keep what I think is the desired behavior, while restoring auto-connect functionality that improves the UX on desktop and especially on mobile using Mobile Wallet Adapter.

I've (manually, but heavily) tested connect, disconnect, wallet switching, error handling, autoconnect, and account viewing on desktop with multiple wallets. I didn't test transactions in Mango because the UI is currently warned to be non-functional.

Screenshots

Wallet Menu

Backpack and Glow, both Standard Wallets, are detected without using adapters. Glow's adapter is included in the code, but the Standard Wallet is used instead, without duplication.

Connected Wallet

Backpack, a Standard Wallet, is shown connected to Mango without using an adapter.

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Name	Status	Preview	Updated
mango-ui-v3-devnet	✅ Ready (Inspect)	Visit Preview	Oct 23, 2022 at 0:58AM (UTC)
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[jordaaash]

Updated to the latest RC of wallet-adapter-react. No functional changes for dapps, just makes how wallets are detected on the window more robust.

[jordaaash]

Maybe don't review just yet, still making some internal changes. This won't affect you, but want to avoid spamming you with new RCs.

[jordaaash]

We're at RC 9, which looks likely to be the last RC. This now updates Mango to use the latest RC. I'll follow up once we hit full release. There are no functional changes for apps with this update. It makes how wallets attach to the window more robust.

[mschneider]

i just tried your changes locally on devnet yarn devnet

1. an error appears after connecting sollet and navigating the page a bit:

2. after reconnect the wallet adapter tries to auto-reconnect sollet, which causes chrome to "prevent a popup", after allowing the popup, sollet does not load the wallet connect dialogue, but show the balances, as if sollet.io was opened in a new window:

3. after closing the popup i try to connect sollet manually again, wallet never really connects. then tried to open the list of accounts (click on the wallet connect button that now displays profile name and wallet pubkey) and got another error:

[jordaaash]

@mschneider thanks for the repro steps, will try this. What version of node are you on so I can run the same?

[mschneider]

17.4