Docs: add API Docs & README for Validation utility

[dreamorosi]

What were you searching in the docs?

We have recently completed the implementation for the upcoming Validation utility, but haven't written any API docs nor README yet.

Is this related to an existing documentation section?

No response

How can we improve?

We should write API docs in each public method/function/type/property, so that customers can have an idea of how to use the utility.

The actual utility docs will be reviewed in a separate issue.

Got a suggestion in mind?

No response

Acknowledgment

• I understand the final update might be different from my proposed suggestion, or refused.

[github-actions]

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