[Documentation] JSDoc documentation for all functions

[dmvt]

User Story

• As an <audience/user>: dev
• I want to <action/task>: be able to read concise documentation of what each function does
• so that <outcome/goal/benefit>: so I don't have to read the code to know what's happening

Type

• [ ] Enhancement
• [X] Maintenance
• [ ] Refactor

Description

https://en.wikipedia.org/wiki/JSDoc

Definition of Done

• [ ] https://github.com/pie-dao/btc.piedao.org/blob/development/src/pages/Liquidity.jsx
• [ ] https://github.com/pie-dao/btc.piedao.org/blob/development/src/setup/tokens.js

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