Provide an activity and action builders for fields validation

[kallydev]

What feature is it?

actionBuilder := activity.NewActionBuilder(type.TransactionTransfer, from, to)
actionBuilder.SetPlatform(decentralized.Platform1Inch)

action, err := actionBuilder.Build() // Build and check all fields.

What problem does this feature solve?

Using Activity and Action structures directly can easily lead to invalid or missing values in some fields, which can be avoided using builder pattern.

Additional description

No response

This is not a duplicated feature request or new worker proposal

• I have searched existing issues to ensure this feature has not already been requested and this is not a New Worker.

[kallydev]

This can ensure that the necessary fields are assigned at compile time, but the checks for the values of the fields are still at runtime.