Chore: Replace Token/Decimal usage with useDapps Currency/CurrencyValue classes

[L03TJ3]

Currently in the app the Token class from uniswap sdk is being used. There are now multiple local helper methods, repeated passing down of multiple split-up props and formatting done in a way which makes for overcomplicated ui components.

I would like to see it replaced by https://usedapp-docs.netlify.app/docs/api%20reference/models/#currency

1. it can be used for: native-tokens / erc-Tokens / FiatCurrency's
2. no need for 3/4 different libraries to work with tokens or currencies (Token/Decimal.js/ethers.utils etc)
3. Would remove the need of maintaining local helper methods
4. easier formatting and simplification of ui components
5. aligning a standard on how we present the G$ token and amounts/values

Likely this can be re-used as well: https://github.com/GoodDollar/GoodWeb3-Mono/blob/master/packages/sdk-v2/src/sdk/constants.ts

[L03TJ3]

@decentralauren @patpedrosa whenever there is room in a sprint I would like to add this. nothing is broken as far as I can tell, just would be pushing a standard across our dapps how we manage/handle/format Tokens and Currencies

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