on-demand-dictionary-asset

A tokenizer, spellchecker or analyzer needs a multi-megabyte dictionary that would bloat every install for a feature most users leave off — fetch it once, on opt-in, into a plain directory, and make every consumer ask the filesystem "am I ready" rather than trust a flag. Use when a per-language asset inflates a package on only one target, when a half-downloaded asset must never look installed, or when a feature…