Variable Directory`Const`

Directory: {
    CACHE: "racehorse://cache";
    DATA: "racehorse://data";
    DOCUMENTS: "racehorse://documents";
    EXTERNAL: "racehorse://external";
    EXTERNAL_STORAGE: "racehorse://external_storage";
    LIBRARY: "racehorse://library";
} = ...

Device-independent URIs for well-known directories.