In order to for MEX to support musical notation, a ValueStrategy must be registered for the datatype. Since the "musical-notation" datatype is added and defined by Extension:Score, this support should be added in that extension's repo, and not in Wikibase directly.
An example of registering strategies in another extension can be found here: Add support for Lexemes in wbui2025
Acceptance criteria
- the value strategy is registered with the snakValueStrategyFactory when wbui2025 is enabled
- 'musical-notation' is removed from WBUI2025_UNSUPPORTED_DATATYPES (in Wikibase)
- it is possible to add and edit statements with musical notation datatype
- there is a test (in Score) that confirms the happy-path of adding and editing a statement