feat(liquid-staking): Add swETH

[chefilip]

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PR-Codex overview

This PR enhances the Liquid Staking feature by updating token logos, request withdrawal function handling, and adding SWETH support.

Detailed summary

• Updated tokenLogo to accept string | null
• Added SWETH support in liquidStaking config
• Modified useRequestWithdraw to handle requestWithdrawFn
• Added getRate to Liquid Staking constants
• Updated LiquidStakingStakePage to use getTokenLogoURL
• Added swETHAbi to handle SWETH functionality

The following files were skipped due to too many changes: apps/web/src/config/abi/swETHAbi.ts

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