feat: support key for table field content

[xrutayisire]

Resolves: DT-2635: [S] AADev, I can use the key for each row and cell as a unique identifier

Description

• We need to have a unique key for each row and cell. This would allow us and user to easily map over rows and cells having a unique identifier and prevent hacky things like JSON.stringify or using index.

Checklist

• A comprehensive Linear ticket, providing sufficient context and details to facilitate the review of the PR, is linked to the PR.
• If my changes require tests, I added them.
• If my changes affect backward compatibility, it has been discussed.
• If my changes require an update to the CONTRIBUTING.md guide, I updated it.

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[dani-mp]

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