Issue Refactor Coin class to use CoinStruct instead of ObjectData #7920

[Mprogrammer2020]

Description

Describe the changes or additions included in this PR.

Test Plan

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If your changes are not user-facing and do not break anything, you can skip the following section. Otherwise, please briefly describe what has changed under the Release Notes section.

Type of Change (Check all that apply)

• [ ] protocol change
• [ ] user-visible impact
• [ ] breaking change for a client SDKs
• [ ] breaking change for FNs (FN binary must upgrade)
• [ ] breaking change for validators or node operators (must upgrade binaries)
• [ ] breaking change for on-chain data layout
• [ ] necessitate either a data wipe or data migration

Release notes

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Name	Status	Preview	Comments	Updated (UTC)
mysten-ui	✅ Ready (Inspect)	Visit Preview	💬 Add feedback	Feb 27, 2024 11:40am
sui-core	✅ Ready (Inspect)	Visit Preview	💬 Add feedback	Feb 27, 2024 11:40am
sui-typescript-docs	✅ Ready (Inspect)	Visit Preview	💬 Add feedback	Feb 27, 2024 11:40am

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explorer	⬜️ Ignored (Inspect)	Visit Preview		Feb 27, 2024 11:40am
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