Move Solana deposit/depositAndCall tasks from Localnet to the Toolkit

[fadeev]

Right now we have Solana deposit/depositAndCall both in Localnet and in the Toolkit.

We need to move this functionality into the Toolkit, so that there is no duplication of logic.

Solana Toolkit functions should:

• Be compatible with Localnet, testnet (devnet) and mainnet. For example, it should intelligently get the correct Gateway address. On Localnet it's easier to pass Gateway address as a CLI argument, for testnet/mainnet Gateway address should be read from the protocol contracts JSON.
• Accept both SPL and SOL.
• Callable both from CLI (for example, Hardhat task) as well as from the frontend. Here's a quick and dirty example of how existing Toolkit Solana functions can be called from the browser.

Examples should be updated to use Toolkit Solana functions (right now they're using Solana functions from Localnet).

[fadeev]

@hernan-clich this PR #222 has to be merged before working on this issue.

[fadeev]

As we're probably going to be moving away from using Hardhat as a task runner, it would be great to move as much functionality as possible from tasks into client/src/solanaDeposit*.ts.

[fadeev]

We should consider using Anchor TS client generator https://coral-xyz.github.io/anchor/ts/index.html instead of directly calling the Gateway.

[fadeev]

Replaced by two issues:

• Command: solana deposit #251
• Command: solana deposit and call #252