feat(preset): add lexicon entry for custom share tokens

[ArtificialOwl]

• moving 'shareapi_allow_custom_tokens' to Lexicon.
• adding the param (string) note: to __constructor() in Lexicon Entry
• displaying optional note when setting via occ

[come-nc]

Where are note and warning used?
Why are they part of definition and not in their own property?
Also looks like a use for Preset class is missing.

[ArtificialOwl]

Where are note and warning used?

I was thinking to display it on set:

Why are they part of definition and not in their own property?

I could, but I am afraid it will just make a lot of parameters in the constructor()
fixed.

Also looks like a use for Preset class is missing.

fixed.

[ArtificialOwl]

no warning, single note: