Text alignment feature

Hello everybody

Thank you for your good and useful product :)

But there is no text alignment feature and i think it is very necessary when we want write with several language.

Please add alignment properties for trix editor content.

Good luck.

The issue names no files or tests. Start by locating Trix's editor formatting entry points and existing content properties, then determine how alignment should be represented and applied across supported languages. Done means alignment properties are available for Trix editor content and their behavior is covered by the project's relevant tests.

Written by the indexing model from the issue text.