Would you consider adding a LICENSE file?

Hi! We depend on `CodeEditSymbols` in a small macOS app and want to ship it
with correct attribution for the packages we bundle.

This repository doesn't currently have a `LICENSE` file, and there's no license
statement in the README — so there's no explicit grant covering redistribution
of the package inside a distributed application. The sibling repos in the org
(`CodeEdit`, `CodeEditSourceEditor`) are MIT, so we suspect that's the intended
license here too and the `LICENSE` file just hasn't been added yet.

Would the team be open to adding the org's standard MIT `LICENSE`? It would let
downstream apps like ours reproduce the required attribution correctly.

We're also contributing fixes upstream — see #22 — so we're invested in the
package's health.

Thanks so much!

リポジトリの現在のREADMEを確認し、兄弟リポジトリであるCodeEditおよびCodeEditSourceEditorのライセンスと比較してください。組織の標準MITライセンスがここにも適用されることを確認したうえで、LICENSEファイルとREADMEへのライセンス記載を追加してください。下流のユーザーが再配布および帰属表示の条件を確認できれば完了です。

索引モデルが issue の本文から書いたものです。