As an editor I want to make statements on Lexemes that reference Forms on other Lexemes in order to indicate their relation.
Example usage: on the Lexeme "hard" we'd have a statement "rhymes with: card". "card" would be a Form on the "card" Lexeme.
We assume this to be an almost 100% exact copy of {T165580} including the subtasks listed there.
Acceptance criteria:
* I can create a new property with data type “Form”.
* I can create a new statement that references a Form on another Lexeme.
* I can select the Form via an entity selector that shows me a derived label for the referenced Form.
* Once saved the value shows the derived label for the referenced Form.
Needs to be broken down into:
* Defining the data type (S)
* Adding a new statement linking to a form (just by ID) via the UI (S)
* Improving the selector with search + showing a label (might be postponed)
* {T175030}