en to zh_CN translation catalogue (3 entries)

[ctx: Title of the CKEditor5 editor.]
en: Rich Text Editor, %0
zh_CN: 富文本编辑器， %0

[ctx: Title of the CKEditor5 editor.]
en: Rich Text Editor
zh_CN: 富文本编辑器

[ctx: Label of the block toolbar icon (a block toolbar is displayed next to each paragraph, heading, list item, etc. and contains e.g. block formatting options)]
en: Edit block
zh_CN: 编辑框
