Move from @hidden to @internal

[RaananW]

Setting as Draft for now to check side effects
There shouldn't be any, just need to be 100% sure :-)

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[sebavan]

Is it not messing the playground checks for typings ? I remember we had special rules there but can not remember if there were for @hidden or only removing _ functions.

[RaananW]

Is it not messing the playground checks for typings ? I remember we had special rules there but can not remember if there were for @hidden or only removing _ functions.

I could not find any reference of hidden in the playground, and have checked the playground - it doesn't show any hidden/internal options.

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