refactor: replace `lib` with `@boxfish-studio/candymachine-client-sdk`

[aspnxdd]

Fixes #81

Changes

• Add candy machine client SDK.
• Remove existing lib.
• Fix minor things.

Checks

• [x] Have you catchup your branch with the latest state in base?
• [x] Have you lint your code locally prior to submission?
• [x] Have you reviewed your proposed changes and removed debris?
• [x] Have you successfully ran due tests with your changes?

[boxfish-bot]

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