Loads all known values from the bundled JSON registry files.
Returns a flat array of KnownValue instances parsed from all
bundled registry files. The caller is responsible for inserting
them into a KnownValuesStore (later entries override earlier ones
when codepoints match).
Loads all known values from the bundled JSON registry files.
Returns a flat array of KnownValue instances parsed from all bundled registry files. The caller is responsible for inserting them into a KnownValuesStore (later entries override earlier ones when codepoints match).