Add named per-game domain dictionaries matched by window title

[jssblck]

Why

Mite still has game/domain terms represented as source-level overlays. We should eventually make this a first-class dictionary mechanism, but it is out of scope for the current baseline deinflection work.

Desired Shape

• Support a compile-time dictionary directory in the repo for bundled domain dictionaries.
• Support a runtime dictionary directory under the Mite local data directory, e.g. %LOCALAPPDATA%\mite\domain-dictionaries.
• Domain dictionaries should be named.
• If multiple dictionary files share the same name, merge them.
• Dictionaries should declare window-title matchers so watch can automatically activate the right per-game dictionaries from the current target window title.
• Eval tooling should have a way to load a named dictionary explicitly so the same path can be tested without a live window.

Notes

This should wait until after the recursive deinflection/span-resolution work lands. Keep the current goal focused on baseline deinflection accuracy.